Over Hauling Kit For Duplex Check Valve Of M/S. Knorr Bremse India Pvt. Ltd. Make Used In Air Spring Suspension System Of Emu Coaches Consisting Of 4 Items To Drg./ Spec.No As : 1) Sealing Ring A38 X44 Din 7603 = 02 Nos/Sets . 2) O Ring 4 A75374 = 02 Nos/Sets. 3) Toothed Washer 4 A63625 = 02 Nos/Sets. 4) Valve Head = A48128 = 02 Nos/Sets Confirming To Rdso S Spec.No. Str K407 (Rev 02). As Per Drg.No. As Per Deion Specn: Spec.No. Str K407 (Rev 02)