supply of kit of spares for mr isolating valve of m/s escorts make modular brake controller type esbc lll (m ) comprising of 4 itemskit of spares for mr isolating valve of m/s escorts make modular brake controller type esbc lll (m ) comprising of 4 items,kit of spares for mr isolating valve of m/s escorts make modular brake cont roller type esbc lll (m ) comprising of 4 items as (i) kring,escorts pt.no.6406,qty/set: 2 nos, (ii) sealing ring a30 x 36 ,escorts pt.no. 6408 ,qty/set: 1 no,(iii) compression spring ,escorts pt.no. 6409, qty/set:1 no and (iv) piston sub.assly,escorts pt.no.6405,qty/set:1 no [ warranty period: 30 months after the date of delivery ] ]