Description Highly saturated nitrile butyle rubber works with R-12 and R-134a. Packed in a rugged plastic storage case. Assortment contains: (20" 7/32"x1/16? (20" 1/4?x1/16? (20" 6.8x1.9 (20" 5/16?x1/16? (20" 7.8x1.9 (20" 8x2" (20" 8.8x1.9 (15) 7/16?x1/16? (15) 7/16?x3/32" (15) 11x2" (15) 12x2" (10) 13.9x1.8"(10) 9/16?x3/32" (10) 14x2" (10) 15x2" (10) 17x2" (10) 11/16?x1/16? (15) 11/16?x1/8"