KMC Stampings COL0609Z1 .375 in. Dia Medium Duty44; Rubber Cushion Clamp .281 Hole44; 50 Pieces Epdm rubber cushion Chem-treated g-90 per astm a653&#47;a653m for corrosion resistance Color &#47; finish - Epdm black cushion Clamping diameter - .375 in.