Spherolastic Rubber Bearing (Silent Block) For Aar-H Type Tight Lock Coupler Head For Lhb Coaches Conforming To Rdso Specification No. Rdso/2011/Cg-03 Rev-03 , Amendment Slip No 1. Of July 202 4. Make Of Silent Blocks Should Be Either Tvs Or Gmt Vide Rdso Letter No. Mc/Blb/Cbc Dt 31-08-2024. Item Should Be Procured From Rdso Approved Vendor Sources For Aar-H Type Tight Lock Coupler Head For Lhb Coaches. As Per Rdso'S Letter No. Mc/Blb/Cbc Dated:28.04.2025, Silent Block Should Be Interchangeable Among Various M Ake. Rdso Item Id: 3100211 [ Warranty Period: 30 Months After The Date Of Delivery ] ]