Manufacturer DescriptionRAM 1.5" Ball Mount with 2.5" Round Base & 2" x 4" Plate for the Humminbird Helix 7 ONLY The RAM-202-24-202U, powder coated marine grade aluminum mount, consists of a double socket arm mount, one round 2.5" diameter round base with the universal AMPS hole pattern and one 2" x 4" rectangular base. Rubber ball, socket technology dampens shock and vibration, as well as allows for almost infinite adjustment, perfect viewing angles. Compatible Devices: Humminbird Helix 7 (Please Note: The Humminbird Helix is not included with this mount)Weight Capacity: Up to 10 lbs.FeaturesMaterial: Powder Coated Marine Grade AluminumBall Size: 1.5" Rubber Ball SizeNote: The "U" in the part number reflects product packaged in poly bag. What's Included In The Box?The RAM Mount Humminbird Screw Down Large Marine Mount for Humminbird Helix 7 ONLY ships with the following items included:RAM Mount Rectangular 2 x 4 inch Plate with 1.5 inch BallRAM Mount Standard Length Dual 1.5 inch Socket ArmRAM Mount Round Plate with 1.5 inch Ball RAM-202U