supply of purchase of set of ball type isolating cock etc.purchase of set of ball type isolating cock etc.,set of ball type isolating cock with vent for locos consisting of two items (i) 3/8 inch ball type isolating cock with vent qty.- 1 no./set. (ii) 1/2 inch ball type isolatin g cock with vent qty. - 6 nos./set as per clw drg. no. [1] clw drg. no.0/2/65/364 alt.-7 and [2] clw drg. no.0/2/65/364 alt.-7 item - 6 as per str no. clw/2021/eldo/m/str/121 rev.0 [ warr anty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]