ADA-S2Seaview's innovative new modular electronic mounts feature a unique universal plate design that provides a cleaner look and greater installation flexibility. A pre-drilled anodized aluminum plate is incased inside the UV stable white ABS plastic. There are dimple holes on the top surface of the top plate match up with a drill template allowing you to precisely drill the appropriate holes for your specific radar. The end result is a nice clean look with no unwanted visible holes.This modular Top Plate fits: Intellian i4 / k4 / d4 / i6 / k6 / d6 / S60 / FB500KVH M5 / M7 / Trac 50 / HD7 / V7 / F55Raymarine 45STV / 60STVSea-King 1800HDSea-Tel (Cobham) C18 / C24 / ST24 / USAT24VDO Ocean Line 345 / 360 / 445 / 460.