Gasket For Btpgln Tank Wagons (Eduction Valve Gasket) Thickness 3.2Mm, O.D.101.7 Mm, I.D. 82.4 Mm To Rdso Drg. No. Wcs-7801-S-62 Alt-4.Material -As Per Is:2712/2024 Grade W/2 & O/2 Compressed Asbestos Fiber Jointing (Graphite). Make: Ferolite, Hilite, Thermoseal, Champion Or Similar.