Insulation Gasket(Non-Asbestos); Thickness:-3+/-0.25Mm, Internal Diameter:-90-92Mm And O Uter Diameter:-178-180Mm. The Finished Gasket Shall Be Free From Visible Defects From Its Appearance And Serviceability. The Surface Shall Be Uniform, And Have Smooth Surface. The Material Shall Be Flat, Circular, A Nd Neatly Trimmed, Shall Have No Loose Strands Of Material In Inner Edges. The Material Shall Have Anti-Burn Ing Properties To Resist Molten Metal Upto 1610 Degc Temperature, So That The Inner Edges Does Not Burn O Disintegrate When Hot Metal Comes In Contact. [ Warranty Period: 30 Months After The Date Of Delivery ] ]