Rectangular 'O' Ring As Per Size= Length - 156Mm/150Mm, Width - 52Mm/46Mm, Thic Kness -3Mm In Polyurethane Rubber Hardness - 75 (+/-5) Degree. One Sample To Be Approved Before Bulk Supply. Test Certicate Should Be Provided From Govt. Nabl Approved Lab. Materi Al: Polyurethane Rubber As Per Rdso Specification No.Rdso/M&C/Rp-115/2005 Or Latest Compo Und B. [ Warranty Period: 30 Months After The Date Of Delivery ] ]