Tradespro 835793 O-Ring Assortment, 270-Piece Includes 20 piece each: 7/32 by 1/16, 1/4 by 1/16, 9/32 by 5/64, 5/16 by 1/16, 5/16 by 5/64, 5/16 by 5/64, 11/32 by 5/64 Includes 15 piece each: 7/16 by 1/16, 7/16 by 3/32, 7/16 by 5/64, 1/2 by 5/64 Includes 10 piece each: #12 9/16 by 1/16, 9/16 by 3/32, 3/8 by 5/64), #15 (5/8 by 5/64) #16 (11/16 by 5/64), #17 (1/16 by 1/16), #18 (11/16 by 1/8) Storage case keeps o-rings clean and organized