supply of set of rubber gasket for union coupling comprising of 06 items 420 nos. , set of rubber gasket for union coupling comprising of 06 items 420 nos. as per sketch no. bsl/elw/sk.no. 9162 alt-3 ref-1 to 6 only. ( this item is reserved for clw approved source only)( this is shelf life items and should be procured with staggered delivery period. supplier to mention /print date of manufacturing on the item & item to be supplied within 90 days of man ufacture date. ) [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]