High-quality materials: Made of high-quality commercial grade nitrile rubber (NBR, Buna-N), with good water and oil resistance, good sealing, corrosion resistance, high temperature resistance, and abrasion resistance.O-ring seal hook kit: This O-ring kit has a hook and pick set (4 pieces), you can easily remove the O-ring and various seals and bushings. The long rod allows you to reach areas that cannot be reached by regular-sized hooks and paddles. These long hooks and picks are perfect for removing O-rings, hoses, gaskets, molds, clips, seals, cotton pins, etc.Wide range of applications: Nitrile rubber is the most widely used O-ring material in the term. It has good mechanical properties, water resistance, most basic oils, lubricants and some fuels. Nitrile rubber metric O-rings prevent fuel pipeline, mechanical, hydraulic and pneumatic maintenance leaks; provide a safe seal for any oil, air and water sealing applications (faucets, sinks, filters).Easy to use and affordable: 32 sizes, 1225 pieces of NBR rubber O-rings are stored in a sturdy transparent plastic box with a label, making it easier to store and carry. This O-ring set covers the most commonly used sizes and can meet almost all your needs. Value for moneyColour: blackMaterial: nitrile rubberPackage Contents:1225 * O Rings4 * O-Ring RemoverOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.