1/2" Soft Seated Check Valve To Wsf Pt.No.A-83288/4, Pamphlet No. Ai-221,Shee T No.1. .Each Unit Should Be Embossed Engraved With Makers Name,Month,Year & Batch N O.Of Manufacturing At A Conspicious Place.Bulk Purchase Shall Be Made From Clw Appd. Sources (23167695) [ Warranty Period: 30 Months After The Date Of Delivery ] ]