Cam portion = Aluminum Flange portion = unplated iron Flanges are designed to mate with 150# flange Flanges have the save bolt hole pattern as an ANSI 150# flange, the thickness may vary TabsPart Finder Size 1 2” female cam3” female cam4” female cam6” female cam8” female cam Size 2 2” flange Result SKU: CAM2FL-F Weight: 2 lb Part Table 5 Items Part Size Size 2 Weight CAM2FL-FCAM2FL-F 2” female cam 2” flange 2 lb CAM3FL-FCAM3FL-F 3” female cam 3” flange 3 lb CAM4FL-FCAM4FL-F 4” female cam 4” flange 4 lb CAM6FL-FCAM6FL-F 6” female cam 6” Flange 5 lb CAM8FL-FCAM8FL-F 8” female cam 8” Flange 22 lb