Complete flat surface, drill-down mounting solution for large marine electronics with an overall height of 11.5" RAM Mounts ball and socket technology allows for near-infinite adjustability Made of power-coated, marine-grade aluminum for durability and reliability in the most demanding marine environments Backed by a lifetime warranty Compatible with Navico/Lowrance 8+ Inches, including: HDS, Elite series, SIMRAD. Compatible with Raymarine 8+ Inches, including: Element and Axiom models. Compatible with Garmin 8+ Inches, including: ECHOMAP, GPSMAP.