Procurement of Set of items for Intermediate overhauling kit for BC relay valve ( J1 Relay Valve ) to KBI Part No. 735690, consisting of four items as per details given below. ( 1 ) Gasket cover to KBI Pt. No. 735683- Qty. 01 No. ( 2 ) O ring to KBI Pt. No. 734686- Qty. 03 Nos. ( 3 ) Diaphragm to KBI Pt. No. 739277- Qty. 01 No. ( 4 ) O ring to KBI Pt. No. 737700- Qty. 01 No.