Tenders for Supply of Piston Seal E.P. Contactor, Bhel Drg. No- 25801130044P1 Mat:- Polyurethane, Rdso Spcen No - Mc/R-115/1980 Brand - Bosco Or Similar. E.R. Drg. No.12317597, Alt-4.. Piston Seal E.P. Contactor, Bhel Drg. No- 25801130044P1 Mat:- Polyurethane, Rdso Spcen No - Mc/R-115/1980 Brand - Bosco Or Similar. E.R. Drg. No.12317597, Alt-4. Warranty Period: 30 Months After T He Date Of Delivery