Fish Finder Mounting Plate: The rectangle plate includes a C size 1.5" TPU ball and contains a variety of pre-drilled holes that are compatible with several marine electronic devices, including fish finders and chartplotters
Sturdy & Durable: The round base & rectangle plate made of 6061-T6 aluminum alloy material with CNC machining and iii grade hard anodized surface. The long double socket arm made of powder-coated, 6061-T6 aluminum alloy for durability and reliability in the most demanding marine environments