Graphite Disc12.5 Mm Od,5.08 Mm Thick,3.17Mm Dia Hole. Specification No. Astm D2,L 4072. [ Warranty Period: 30 Months After The Date Of Delivery ] [Quantity Tolerance (+/-): 5 %Age , Item Category : Normal , Total Po Value Variation Permitted: Max 8 Lacs ] ]