Procurement Of Lead Pig Ingot Grade 99.99% Soft To Is:27 / 1992 ( Reaffirmed 1997 ) With Amendment No.1., Lead Pig Ingot Grade 99.99% Soft To Is:27 / 1992 ( Reaffirmed 1997 ) With Amendment No.1. [ Warranty Period: 30 Months After The Date Of Delivery ]