Gem Bids For Ss304 Spiral Wound Gasket Filler : Asbestos Centering Ring : Cs Inner Ring : Ss304 Thickness : 4.5mm Winding : Ss304 Rating : 300# To Suit Flanges As Per Ansi:b16.5. Upto And Including 600 Nb And Asme B16.47b Series For Above 600 Nb. Gasket Tolerance: As Per Asme B16.20-1993