Copper Crush Washer Assortment 1/16" Thick SAE Flat Ring Brake Line Seal 110 PC COPPER FLAT WASHER HARDWARE ASSORTMENT KIT USE IN ELECTRICAL APPLICATIONS TO ASSURE MAXIMUM CONDUCTIVITY INCLUDES: (30) 1/4" (1/32" thick); (25) 5/16" (1/16" thick) (20) 3/8"; (1/16" thick); (15) 7/16"; (1/16" thick) (10) 1/2"; (1/16" thick); (10) 5/8"; (1/16" thick)