Designed for High Salt Marine Environment - Constructed of Powder-Coated Marine-Grade Aluminum and Stainless Steel Hardware. The mount has been Salt Spray Tested for thousands of hours (including stainless steel bolts and springs) to resist high salt water corrosion. Cast in one piece of aluminum rather than screwed together, it remains strong and durable even under the impact of waves. Heavy Duty - The weight capacity of the marine electronic mount can be up to 15.5 lbs at rest and 4 lbs at motion. The rectangle plate contains different combinations of pre-drilled holes which will match up to many electronic devices and mounts, including Marine GPS, CB Radios, Ham Radios, Gimbal Brackets and more. The AMPS hole pattern is designed to install directly in a boat, kayak or on any flat surface (Complimentary 4 sets of 316 marine grade stainless steel machine screws, lock nuts and sheet metal screws). Universal Design - Includes a C size 9.1" length 1.5" double socket arm and a complete flat surface, drill-down mounting solution; The ball and socket technology allows for near-infinite adjustability. Perfectly fits 1.5" / C size / 38 mm ball systems, Compatible with RAM Mounts, Arkon, iBolt and others. Compatible with Garmin: ECHOMAP CHIRP 72, 73, 74, 75, ECHOMAP CHIRP 92, 93, 94, 95, ECHOMAP Plus 7", ECHOMAP Plus 9", ECHOMAP UHD 6", ECHOMAP UHD 7", ECHOMAP UHD 9", ECHOMAP UHD2 5", ECHOMAP UHD2 7", ECHOMAP UHD2 9", GPSMAP 7" Series, GPSMAP 8" Series, GPSMAP 9" Series, Striker 5, Striker 7, Striker Plus 5cv, Striker Plus 7 Series, Striker Plus 9sv, Striker Vivid 5cv, Striker Vivid 7 Series, Striker Vivid 9sv, other Fishfinders and GPS Chartplotters. Compatible with Lowrance: Eagle 7, Eagle9, ELITE FS 7, ELITE FS 9, Elite-7 Series, HDS Carbon 7, HDS LIVE 7, HDS LIVE 9, HDS PRO 9, HDS-5 Series, HDS-7 Series, Hook Reveal 7, Hook Reveal 9, HOOK-7, HOOK-9, HOOK2-7 Series, HOOK2-9, other Fishfinders and GPS Chartplotters. Compatible with Humminbird: Helix 8, 9, Xplore 9, other Fishfinders and GPS Chartplotters (NOT compatible with: the Humminbird Helix 5, 7, 800 & 900 & lon & Onix & PiranhaMax Series) Aluminum 1.5" Ball Fish Finder Mount, 9‘’/23cm long Arm Marine Electronic Mount, Universal Mounting Plate with 1.5 inches / 38mm / C Size Ball, Compatible with Garmin, Lowrance and More