Aluminum Cable Clamps - Rubber Insulated Metal Wire Clamps
The Plumber's Choice 1-1/2 in. Steel Cable Clamp; Hangs Tubing, Wiring, Ropes, for PEX, Plumbing, Marine, Automobile; Galvanized 112CPSWG - The Home Depot
Lowbrow Customs Clutch / Brake Cable Clamp - Aluminum - for 1-1/4 inch Frame Tubing