This 200-piece Diving O-Ring Set is made from high-quality nitrile rubber (NBR), offering excellent resistance to oil, heat, wear, and chemicals. Designed for durability and long service life, these antistatic O-rings are ideal for sealing air, gas, water, fuel, and lubricants. Their soft, flexible construction allows for easy installation while protecting hoses, cables, and lines from abrasion and vibration. Perfect for various diving applications, the set includes 18 assorted sizes housed in a convenient storage box.