1.material: zamak3 zamak5 2. Set Screw Connector and Coupling 3.size: 1/2" 3/4" 1" ... /2" 2" 2-1/2" 3" 4" suitable for EMT Set Screw Connector 1)Material: aluminum A380, ADC12 , ADC10, ZL102 ; zinc ZA ... Cad, Slid Work, CAXA, UG, CAD/CAM/CAE4)Secodary machining: CNC turning, Milling, Drilling, Grinding5)Surface Treatment: Chrome Plating, Sandblasting, Painting ...