Attributes . Part# COL2809Z1 1-3/4 In. Diameter Medium Duty Clamp Hot-Dipped Galvanized Steel, Chem-Treated G90 Black EPDM Rubber Cushion Manufactured by KMC Stampings 1.75 In. Clamping Diameter 0.281 In. Screw Hole Size 0.5 In. Width 0.048 In. Material Thickness . Names