N60013-5 contains 382 pieces of multipurpose 90 Durometer O-rings in 30 different sizes. The smallest O-ring has an I.D. of 1/8", O.D. of 1/4" and cross section of 1/16". The largest O-ring has an I.D. of 1-3/4", O.D. of 2-1/8" and cross section of 3/16".