Kootans 32Size 1225 Pcs.Metric Nitrile Rubber O Rings Assortment Kit 4 ?GOOD MATERIAL? Made of quanlity nitrile rubber (NBR, Buna-N) material, good water and oil resistance, good sealability, corrosion resistant, high temperature resistant and wear resistant. ?4PCS HOOKS INCLUDED? This O rings kit come with 4pcs hooks for easy install or remove o rings. The long shaft help you to access areas that conventionally sized hook just can't reach. they are suitable for removing O-rings, hoses, gaskets, moldings, clips, seals, cotter pins and etc. ?WIDE APPLICATION? Nitrile rubber is widely used in many fields. It prevent leaks in fuel plumbing, machinery, hydraulic and pneumatic facilities repairs; Provide good sealing performance for related mechanical equipment with oil, air, gas and water as medium (faucet, sinks, filters). ?EASY TO USE? The rubber o rings kit contains 32 sizes, total 1225 pieces o rings. They are well packed in a sturdy transparent plastic box with labels, more convenient to store and carry. This o ring kit covers many popular common sizes, meets your daily needs. ?AFTER-SALES SERVICE? 30 days money back guarantee. If you have any problems with quality or use, please feel free to contact us. We will do our best to help you solve the problem and bring you a pleasant shopping experience.