interface valve pinch valve oasis part no ofves17000 warranty period 30 months after th e date of delivery quantity tolerance 5 age item category normal total po value variation permitted max 8 lacs interface valve pinch valve oasis part no ofves17000 warranty period 30 months after th e date of delivery quantity tolerance 5 age item category normal total po value variation permitted max 8 lacs lavatory bowl western type with frp module seat