Woolen Felt Strip To Size 8 Mm X 11 Mm X 690 Mm Length Having 0.55 Gms/Cm3 Density Confi Rming To Is 1719-2000. Material Confirming To Is 1719 Need Along With Supply Each Strip Should Be Marked With Procured Name, Batch No., Month/Year Make: Sealwall/ Blue Chip/ Sadhana Only. Material Should Be Pr Ocured From Oem Or Their Authorized Dealer With Oem Test Certificate. (Material Test Certificate Required At T H Time Of Supply.) [ Warranty Period: 30 Months After The Date Of Delivery ] ]