The Plumber's Choice 1-1/4 in. Steel Cable Clamp; Hangs Tubing, Wiring, Ropes, for PEX, Plumbing, Marine, Automobile; Galvanized (10 Pack) 114CPSWG-10 - The Home Depot
Cable Clamps 1/4 inch – 25 Pack Bundle with Nuts and Screws, Rubber Insulated | eBay