Set of 225 assorted rubber O rings for most standard uses. Includes 18 different sizes in a handy divided case. 10x 2.3mm (3/32) (inner diam) x 5.8mm (15/64") (outer diam) 20x 3.1mm (1/8") x 6.2mm (1/4") 20x 3.9mm (5/32") x 7mm (9/32") 15x 5.4mm (7/32") x 8.6mm (11/32") 20x 4.7mm (3/16") x 7.8mm (5/16") 15x 7.8mm (5/16") x 10.9mm (7/16") 15x 6.2mm (1/4") x 9.4mm (3/8") 10x 9.4mm (3/8") x 14mm (9/16") 10x 9.4mm (3/8") x 12.5mm (1/2") 10x 14.0mm (9/16") x 18.8mm (3/4") 10x 12.5mm (1/2") x 17.2mm (11/16") 10x 10.9mm (7/16") x 15.6mm (5/8") 10x 15.6mm (5/8") x 20.3mm (13/16") 10x 15.6mm (5/8") x 18.8mm (3/4") 10x 17.2mm (11/16") x 21.8mm (7/8") 10x 20.3mm (13/16") x 26.5mm (1-1/16") 10x 18.8mm (3/4") x 23.4mm (15/16") 10x 18.8mm (3/4") x 25.0mm (1")Features Include:Organized-by-size see-thru case 225 sized and organized quality rubber o-rings for the cost of just a handful at the store! Perfect for plumbing