Standard Pack = 1 piece(s). 225 Piece O-Ring Assortment Contains:; (10) 3/32 x 15/64 IN; (20) 1/8 x 1/4 IN; (20) 5/32 x 9/32 IN; (20) 3/16 x 5/16 IN; (15) 7/32 x 11/32 IN; (15) 1/4 x 3/8 IN; (15) 5/16 x 7/16 IN; (10) 3/8 x 1/2 IN; (10) 3/8 x 9/16 IN; (10) 7/16 x 5/8 IN; (10)