What materials are these O-rings made of, and are they chemical resistant?

These O-rings are manufactured from commercial-grade Nitrile Butadiene Rubber (NBR). This specific material is highly resistant to motor oil, gasoline, water, and alcohol solvents, making it ideal for automotive and plumbing repairs where chemical exposure is common.

Can I use these O-rings for high-pressure PCP air rifles and scuba gear?

Yes, these NBR O-rings are excellent for high-pressure applications such as PCP paintball guns, Airforce rifles, and scuba diving equipment. Their high abrasion and heat resistance ensure they can withstand the rapid pressure changes without blowing out.

How do I find the correct size O-ring in the storage box?

You can easily find the correct size by referencing the sizing chart printed directly on the lid of the resealable plastic case. The 18 different sizes are neatly separated into individual compartments, preventing them from mixing together during transport.

Are these O-rings suitable for repairing household water leaks?

Yes, these O-rings are perfectly suited for repairing household plumbing leaks. Their excellent water resistance makes them ideal for sealing dripping faucets, showerheads, garden hoses, and under-sink pipe connections.

Can I purchase this O-ring assortment kit at your Hong Kong store?

Yes, this 225-Piece NBR O-Ring Assortment Kit is in-stock and available for immediate pickup at Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po. Our physical store caters to DIY hardware enthusiasts and professional mechanics needing reliable sealing solutions.

225-Piece NBR O-Ring Kit | 18 Sizes Sealing Gaskets

Name: 225-Piece NBR O-Ring Kit | 18 Sizes Sealing Gaskets
Brand: Sun Cheong Computer Company Limited
SKU: 21PS001283
Price: 49.0 HKD
Availability: InStock

Short Product Description

The 225-Piece NBR O-Ring Assortment Kit provides a comprehensive, commercial-grade sealing solution for plumbing, automotive hydraulics, and PCP paintball equipment. Manufactured from high-quality Nitrile Butadiene Rubber (NBR), these black gaskets offer exceptional resistance to oil, gas, water, UV rays, and high temperatures. Neatly organized in a resealable plastic case with 18 popular sizes ranging from 3x1mm to 22x2mm, this kit is available for instant pickup at Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po.

Key Features

18 Popular Sizes: Includes a versatile range of dimensions from 3x1mm up to 22x2mm to cover almost any standard sealing requirement.
Commercial-Grade NBR: Made from premium Nitrile Butadiene Rubber, offering outstanding resistance to oil, gas, water, and alcohol solvents.
High Durability: Engineered to be highly resistant to heat, abrasion, and UV rays, preventing premature cracking and leaks.
Organized Storage Case: Comes in a clear, resealable plastic box with a built-in sizing chart for quick identification and clutter-free storage.
Multi-Industry Application: Perfect for household plumbing, automotive garages, hydraulic machinery, PCP paintball guns, and scuba gear.
Generous Quantity: Provides 225 total pieces (20 pieces for small sizes, 5 pieces for large sizes), ensuring you rarely run out of your most-used rings.

Full Product Description

Commercial-Grade Sealing for Plumbing and Automotive

This 225-Piece O-Ring Assortment Kit delivers reliable, leak-proof seals for a wide variety of high-pressure mechanical applications. Whether you are repairing leaky household plumbing, servicing automotive air conditioning systems, or maintaining hydraulic gas connections, these precision-molded rings prevent fluid and gas escapes effectively. The comprehensive selection of 18 different sizes ensures that personal DIYers and professional workshop mechanics always have the exact replacement gasket on hand.

Superior NBR Material Resistance

These Black Sealing Gaskets are constructed from commercial-grade Nitrile Butadiene Rubber (NBR), making them vastly superior to standard rubber rings. NBR is specifically engineered to resist degradation from harsh chemicals, including motor oil, gasoline, alcohol solvents, and UV exposure. This exceptional heat and abrasion resistance ensures that your seals will not crack, harden, or fail prematurely, even in demanding high-temperature engine bays or outdoor environments.

Pro Tip from Our Technicians

When replacing O-rings in high-pressure equipment like PCP air rifles or scuba diving gear, our Sham Shui Po technical team strongly advises applying a thin layer of pure silicone grease to the ring before installation. This prevents the NBR material from tearing or twisting when you tighten the fittings, ensuring a perfect, airtight seal. If you are unsure which size to use for your specific repair, bring your broken valve or fitting to our physical store, and we will help you match it with the correct O-ring from the kit.

Technical Specifications

Product Type: O-Ring Assortment Kit (Sealing Gaskets)
Material: Commercial Grade Nitrile Butadiene Rubber (NBR) / Silicone
Total Quantity: 225 Pieces
Number of Sizes: 18 Distinct Sizes
Resistances: Oil, Gas, Water, Alcohol Solvents, Heat, Abrasion, UV
Included Sizes (20 Pcs each): 3x1mm, 4x1mm, 4.5x2mm, 5x2mm, 6x2mm, 6x2.5mm, 6x3mm, 7x2mm, 8x2mm
Included Sizes (5 Pcs each): 9x2mm, 10x2mm, 12x3mm, 13x3mm, 14x2.5mm, 17x2.5mm, 18x4mm, 20x2mm, 22x2mm
Packaging: Resealable plastic organizer case with size chart

Delivery Options

Local delivery within Hong Kong and in-store pickup.
Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
In-store pickup details (location and time) will be confirmed by email or phone message.
Delivery times are estimates and may be affected by weather or unforeseen circumstances.

FAQ Section

What materials are these O-rings made of, and are they chemical resistant?These O-rings are manufactured from commercial-grade Nitrile Butadiene Rubber (NBR). This specific material is highly resistant to motor oil, gasoline, water, and alcohol solvents, making it ideal for automotive and plumbing repairs where chemical exposure is common.
Can I use these O-rings for high-pressure PCP air rifles and scuba gear?Yes, these NBR O-rings are excellent for high-pressure applications such as PCP paintball guns, Airforce rifles, and scuba diving equipment. Their high abrasion and heat resistance ensure they can withstand the rapid pressure changes without blowing out.
How do I find the correct size O-ring in the storage box?You can easily find the correct size by referencing the sizing chart printed directly on the lid of the resealable plastic case. The 18 different sizes are neatly separated into individual compartments, preventing them from mixing together during transport.
Are these O-rings suitable for repairing household water leaks?Yes, these O-rings are perfectly suited for repairing household plumbing leaks. Their excellent water resistance makes them ideal for sealing dripping faucets, showerheads, garden hoses, and under-sink pipe connections.
Can I purchase this O-ring assortment kit at your Hong Kong store?Yes, this 225-Piece NBR O-Ring Assortment Kit is in-stock and available for immediate pickup at Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po. Our physical store caters to DIY hardware enthusiasts and professional mechanics needing reliable sealing solutions.

Target Users / Applications

Automotive Mechanics: Replacing degraded seals in car air conditioning systems, fuel lines, and hydraulic power steering pumps.
PCP Paintball & Scuba Enthusiasts: Rebuilding high-pressure air tanks and regulators to prevent dangerous gas leaks during operation.
Household Plumbers: Fixing dripping bathroom faucets, kitchen sink traps, and high-pressure garden hose nozzles quickly and efficiently.