351-Piece Silicone O-Ring Assortment Kit – 10 Standard Sizes

Never get caught short on the right seal again. This comprehensive 351-piece silicone O-ring set gives you 10 different standard sizes in one kit — everything you need to tackle leaks, repairs, and maintenance jobs on cars, pipelines, hydraulic systems, household appliances, and more. Made in Mainland China from premium silicone rubber, these vibrant red O-rings are built to perform where it matters most.

Why Choose This O-Ring Assortment?

10 Standard Sizes in One Kit: 351 pieces covering a wide range of sealing applications, so you always have the right size on hand — no more last-minute hardware runs.
Premium Silicone Material: High-quality silicone rubber offers outstanding resistance to oils, fuels, and high temperatures — ideal for demanding environments like car engines and hydraulic circuits.
Excellent Elasticity & Tight Seal: The flexible silicone conforms snugly to mating surfaces, creating a reliable barrier against liquid and gas leaks for long-lasting performance.
Corrosion & Aging Resistant: Designed to resist deterioration from chemicals, heat, and time — reducing the need for frequent replacements and saving you money in the long run.
Widely Versatile: Perfect for automotive repair, industrial piping, plumbing, HVAC systems, and general household appliance maintenance.

Product Specifications

Material	Silicone Rubber
Color	Red
Piece Count	351 pieces
Size Variety	10 different standard sizes
Country of Origin	Made in Mainland China

Ideal Applications

Automotive engine sealing & fuel system repairs
Industrial & residential pipelines
Hydraulic and pneumatic systems
Household appliances (washing machines, faucets, etc.)
HVAC and refrigeration units
General plumbing and DIY repair projects

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Expert Reference

For guidance on safe handling of rubber and chemical materials in automotive and industrial applications, visit the U.S. Occupational Safety and Health Administration (OSHA).

Frequently Asked Questions

Q: What sizes are included in this 351-piece silicone O-ring set?

A: The kit includes 10 different standard sizes, giving you a wide range of options to handle various sealing tasks across automotive, piping, plumbing, and appliance applications — all in one convenient assortment.

Q: Are these silicone O-rings safe for use in car engines and high-heat environments?

A: Yes! The silicone rubber material is specifically chosen for its excellent oil and high-temperature resistance, making these O-rings well-suited for car engines, hydraulic systems, and other high-heat, high-pressure applications.

Q: How do silicone O-rings compare to standard rubber O-rings?

A: Silicone O-rings generally outperform standard rubber in terms of temperature range, UV resistance, and longevity. They remain flexible across a broader temperature spectrum and are more resistant to aging and corrosion, making them a more economical long-term sealing solution.

Q: Can these O-rings be used for both liquid and gas sealing?

A: Absolutely. The highly elastic silicone material creates a tight, conforming seal against most interface surfaces, effectively preventing both liquid and gas leaks in pipelines, automotive parts, and appliances.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.