407 Pieces Sae Universal O-Ring Kit, Set Of 32 Usa Standard Sizes,, Corner High Quality: Made of Nitrile (NBR) 70 shore material,resistant to heat,low/high temperature,air,water,petroleum products,mineral oil and hydraulic fluids,natural gases,kerosene,silicone fluids,non-aromatic fuels and solvents. Multi size: Includes 32 of the most commonly used sizes ranging from 1/8?? I.D. x 1/4?? O.D. to 2?? I.D. x 2-1/4?? O.D.Can meet almost all your needs. Wide Application:Use for plumbing,machinery,hydraulic pneumatic repairs,water faucet, garages,workshops,cars,doors and Windows, electrical appliances, bearings, pumps, idlers, etc. Handy Packing: Comes with a heavy duty storage case that keeps each size o rings separated and organized,that makes more convenient to carry, select and collect. Customer Service: you are unhappy for any reason, return your kit with no questions asked and we will provide a full refund.