... metal, znic plated, with EPDM (black rubber). Size-1/2" Zinc Plated Pipe Clamp with EPDM Pipe Clamp size-1 ... /2" Pipe clamps thickness-2mm, width-20mm, Nut size-M8 ... .Product thickness range 1.2 mm ,1.5 mm, 1.8 mm, 2.0 mm, 2.5 mm etc. Product width of 20 MM, Nut for M8 + ... ---81-86315---312-31890387-92355---352-358 (1/2 inch) Zinc Plated Pipe Clamp with EPDM