3/4 inch CTS (bag of 10) Sioux Chief 501 series tube strap shall be used where necessary to fasten or secure CTS tubing and IPS piping in residential or commercial applications. Steel tube straps are coated with a smooth copper finish. Mount to wood, metal studs or joists using nail or screw in both holes. Minimum recommended nail penetration is 3/4 inch. Refer to National or Local plumbing codes for proper hanger spacing requirements.