This Jensen AM/FM RV Antenna has a rubber mast which can be used for either a top or side mount. The cable length is a little over eight feet long and it comes with a ground wire. It includes all mounting hardware for a quick and easy installation. The total length of the mast itself is about sixteen and a half inches tall. The diameter of the mounting section is about two and three quarter inches in diameter. Jensen AM/FM RV Antenna Rubber Mast Top or Side Mount Overall Dimensions: 2.75" Diameter x 16.5" Tall Cable Length: 8'3" MODEL NO - 44US01R