RAM Mount RAM 1.5" Ball Mount with Track Ball Base 2" x 4" Plate for the Humminbird Helix 7 ONLY [RAM-202-24-354-TRA1U]RAM 1. 5" Ball Mount with Track Ball Base & 2" x 4" Plate for the Humminbird Helix 7 ONLY The RAM 202 24 354 TRA1U consists of a double socket arm mount, Track Ball base and 2" x 4" rectangular plate. The unique rubber ball and socket technology dampens shock and vibration while offering high adjustibility to achieve the perfect viewing angle. Compatible with any RAM Tough Track system. Compatible Devices: Humminbird Helix 7 Material: Powder Coated