... trunking: 1:easy to installation& low cost 2:samples are free 3:all size are available Detailed Product Descriptions:wiring ... duct, GI cable trunking , steel cable trunking, solid cable trunking , HDG cable trunkingwiring duct, GI cable trunking , steel cable trunking, solid cable trunking , HDG cable trunking ... cable tray, GI cable tray, cable trunking , perforated cable tray2) samples are free ...