• Manufactured from Buna-N.• Suitable for personal & 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.Manufactured from Buna-N. Suitable for personal & professional workshops, garages and plumbing. Supplied in partitioned interspaced box.• Manufactured from Buna-N. • Suitable for personal & professional workshops, garages and plumbing. • Contents: (Approximate Quantity) ID x Thickness; ø1/8" x 1/16", 3/1