supply of poh kit for check valve with choke , poh kit for check valve with choke consisting of 4 items. 1) valve sealing ring to rdso sk-98111 alt-1, item no.4, qty-1 no. 2) compression spring to rdso sk-98111 alt-1, item no. 6, qty- 1 no. 3) sealing ring a39 46 to rdso sk-98111 alt-1, item no. 7, qty-1 no. 4) filter to rdso sk-9811 1 alt-1, item no. 2, qty-1 no. material & specification : rdso spec. no. 02-abr-02 amdt. no.4 of sept. 2016 & appendix-i. note : spares shall be packed in sealed polythene bags. material should be procur ed from rdso approved sources only. [ warranty period: 30 months after the date of delivery ] ]