Soldering Wire 63/37 Grade (I.E.,63 % Tin And 37 % Lead) In Wire Form, 18 Swg, Cored With 2.2 % No Clean Flux . The Composition Shall Be Homogenous. Make: (1) Alpha T Elecore Plus Flux Solder Wire Cored 63Sn/37Pb Alloy By Macdermid Alpha (2) Kester (3) Ai M (American Iron And Metals) [ Warranty Period: 30 Months After The Date Of Delivery ] [Quantity Tolerance (+/-): 5 %Age , Item Category : Normal , Total Po Value Variation Permitt Ed: Max 8 Lacs ] ]