supply of spiral wound gaskets , 40 nb (1 1/2) spiral wound gaskets conforming to asme b16.20, suitable for asm e b16.5 class 150 raised face (rf) flanges with ss316 winding , flexible graphite filler and ca rbon steel outer ring. [ warranty period: 12 months after the date of delivery ] ] , 25 nb (1 ) spiral wound gaskets conforming to asme b16.20, suitable for asme b 16.5 class 150 raised face (rf) flanges with ss316 winding , flexible graphite filler and carb on steel outer ring. [ warranty period: 12 months after the date of delivery ] ] , 15 nb ( 1/2) spiral wound gaskets conforming to asme b16.20, suitable for asme b16.5 class 150 raised face (rf) flanges with ss316 winding , flexible graphite filler and car bon steel outer ring. [ warranty period: 12 months after the date of delivery ] ] , 20 nb (3/4) spiral wound gaskets conforming to asme b16.20, suitable for asme b16.5 class 150 raised face (rf) flanges with ss316 winding , flexible graphite filler and car bon steel outer ring. [ warranty period: 12 months after the date of delivery ] ] , 80 nb (3) spiral wound gaskets conforming to asme b16.20, suitable for asme b1 6.5 class 150 raised face (rf) flanges with ss316 winding , flexible graphite filler and carbo n steel outer ring. [ warranty period: 12 months after the date of delivery ] ]