supply of isolating cock olp typeisolating cock olp type,isolating cock olp type for location other than brake cylinder (ball type) for air brake pa ssenger coaches to rdso drg. no. - sk- 97002, alt.- 2 (this item is provided on the feed pipe branch li ne before the air as well as on thefeed pipe feeding to bp &peav), with conforming to rdso specn no .- 02-abr-2002,read to all amendment with latest amendment no. 4 of sept.- 2016, appendix- i.%u20 1d [ warranty period: 36 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]