PART NO. ORING DIMENSIONS FLANGESIZE WELDTUBEO.D D A D1 D2 L 1FSW-12IN 3/4" 3/4" 24.99X3.53 8.9 41.3 31.7 33 1FSW-16IN 1" 1" 32.92X3.53 9.6 47.6 38 37 1FSW-20IN 1.1/4" 1.1/4" 37.69X3.53 10.4 54 43.6 42 1FSW-24IN 1.1/2" 1.1/2" 47.22X3.53 12.7 63.5 50.8 45 1FSW-32IN 2" 2" 56.74X3.53 12.7 79.4 66.5 45