Back Stop ( Bg.) As Per Drg No :- W / Bd - 699, Alt. 4. And Material . & Specification As Per W D - 70 - Bd - 10 (Rev.4). [ Warranty Period: 72 Months After The Date Of Delivery ] [Quantity Tolerance (+/-): 5 %Age , Item Category : Normal , Total Po Value Variation Permitted: Max 8 Lacs ] ]