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. | Superior Compatibility - The rectangle plate contains different combinations of pre-drilled holes to match many electronic devices and mounts, including Marine GPS, CB Radios, Ham Radios, Gimbal Brackets and more. The 1.5" ball clamp base securely clamps round, square, odd-shaped rails and bars from 1.18'' to 2'' in diameter. Widely used on boat, kayak, ATV, UTV, industrial truck and other vehicles (Complimentary 4 sets of 316 marine grade stainless steel machine screws, lock nuts and sheet metal screws). | Heavy Duty - The weight capacity of the marine electronic mount can be up to 15.5 lbs at rest and 4.5 lbs at motion. Able to hold screens from 5" to 9" securely (available over 10", but fish finder is too heavy not recommended) | Universal Design - Includes a C size 5.9" length 1.5" double socket arm, universal marine electronic devices mounting plate and a grab bar clamp mount base. The ball and socket technology allows for near-infinite adjustability. Perfectly compatible with 1.5 inches / C size / 38 mm adapters and arms from manufacturers such as 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, 10, Solix 10, other Fishfinders and GPS Chartplotters (NOT compatible with: the Humminbird Helix 5, 7, 800 & 900 & lon & Onix & PiranhaMax Series)