Manufactured from Buna-N. Suitable for personal and professional workshops, garages and plumbing. Supplied in partitioned interspaced box. Features & Benefits:Manufactured from Buna-N.Suitable for personal and professional workshops, garages and plumbing.Contents: (Approximate Quantity) ID x Thickness; Ø1/8" x 1/16", 3/16" x 1/16", 1/4" x 1/16", 5/16" x 1/16", 3/8" x 1/16", 1/2" x 1/16" (20 of each), 3/8" x 3/32", 7/16" x 3/32", 1/2" x 3/32", 9/16" x 3/32", 5/8" x 3/32", 11/16" x 3/32", 3/4" x 3/32", 13/16" x 3/32", 7/8" x 3/32" (13 of each), 3/4" x 1/8", 13/16" x 1/8", 7/8" x 1/8", 15/16" x 1/8", 1" x 1/8", 1-1/16" x 1/8", 1-1/8" x 1/8", 1-3/16" x 1/8", 1-1/4" x 1/8", 1-5/16" x 1/8", 1-3/8" x 1/8", 1-7/16" x 1/8", 1-1/2" x 1/8", 1-5/8" x 1/8", 1-3/4" x 1/8", 1-7/8" x 1/8", 2" x 1/8" (10 of each).Supplied in partitioned interspaced box.Model No. BOR407 Specifications: Model No BOR407 Brand: Sealey Contents: (Approximate Quantity) ID x Thickness; Ø1/8" x 1/16", 3/16" x