supply of set of items, set consists of three items as detailed below: 1) baseset of items, set consists of three items as detailed below: 1) base,set of items, set consists of three items as detailed below: 1) base o ring for top grip gauges (both side half removed face) size- od-8mm, id-2mm, thickness- 2.5mm, material: nbr, quantity - 800 nos. 2) base o ring for midland gauges (both side flat face) size- od-7mm, id-3mm, thickness- 3mm, material: nbr, quantity - 90 0 nos. 3) base o ring for rotex magnet valve, size id 14.3 x od 17.9mm x thickness 1.8mm, material: nbr, quan tity - 2500 nos. note:-sample to be approved before bulk supply. [ warranty period: 12 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lac s ] ]