Non- Asbestos Based 'K' Type High Friction Composite Brake Block For Bogie Mounted Brake System Main Line Coaches , Conforming To Rdso Spec. No. C- 9809 ( Rev. - 4 ). Amendment No 1 Of September 2016 Rdso Drg No : Rdso / Sk - 98066 Alt : 6. [ Warranty Period: 18 Months After The Date Of Delivery ] [Quantity Tolerance (+/-): 5 %Age , Item Category : Normal , Total Po Value Variation Permitt Ed: Max 8 Lacs ] ]