Highly saturated nitrile butyl rubber works with R12 and 134a Contains: (20) 7/32" x 1/16" (20) 1/4" x 1/16" (20) 6.8 x 1.9 (20) 5/16" x 1/16" (20) 7.8 x 1.9 (20) 8 x 2 (20) 8.8 x 1.9 (15) 7/16" x 1/16" (15) 7/16" x 3/32" (15) 11 x 2 (15) 12 x 2 (10) 13.9 x 1.8 (10) 9/16" x 3/32" (10) 14 x 2 (10) 15 x 2 (10) 17 x 2 (10) 11/16" x 1/16" (10) 11/16" x 1/8" Not for use with gasoline Molded storage case included