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.