The MT 4 mount is made as a support for the MT 1 mount, it's designed for the 1 1/4" x 1 1/4" receiver. This mount is also 304 stainless steel. The mount comes with an installed anti-rattle kit.
Tarheel Antennas, Inc.18511 CR 304St. Joseph, MO 64505
Technical Support & QuestionsContact Robert in North CarolinaPhone:919-552-8788Email: tarheelantennas@aol.com