The most economical general-purpose 4” diameter mounting pad available. Perfect for mounting your GPS receiver, fish finder, spotlight, fan, speakers, etc. The perfect gift when you don’t know the diameter of the tubing. Comes with mounting hardware for 7/8, 1, 1 1/8 and 1 1/4" round tubing. Plus offers the option of bulkhead mount with enclosed screws. Designed for permanent mounting.