O-RING ASSORTMENT KIT ?Rubber O-Ring Kit includes a wide variety of sizes for sealing faucets, sinks, filters, toilets, oil lines, water lines, and more. VERSATILE RELIABLE ? Made from premium NBR (nitrile butadiene rubber), these O-rings resist water, UV, gasoline, hydraulic fluids, lubricants, grease, and alkalis. Designed to create a strong, long-lasting seal to stop leaks. DURABLE DESIGN ? Each O-ring features a thick-wall construction with commercial-grade rubber for flexibility and durability you can count on. ORGANIZED PORTABLE ? Comes neatly stored in a sturdy, compact case with rings sorted by size for fast, easy access wherever you need them. WHAT?S INCLUDED ? Available in SAE or metric. Includes 32 of the most common O-ring sizes for home, industrial, hydraulic, and pneumatic applications. ? Free Shipping within the Continental USA (excludes US Territories).