Check the listing for details. RAM-D-115 RAM Marine Electronics Mount - D Size Medium.... Color: Black, Condition: New. Listed at 167.94 USD. RAM Marine Electronics Mount - D Size Medium... RAM-D-115 Genuine RAM Products! RAM-D-115 consists of a base with a 2.25" diameter D size ball, a standard arm and a 6.25" x 2" marine electronic plate with a D size ball for supporting larger devices. This marine electronic plate contains different combinations of pre-drilled holes and is a direct fit for 9"-12" fishfinder gimbal brackets. Supports devices such as the Lowrance HDS-9 Gen2 Touch, Garmin GPSMAP 7407 and more.product dimensions Overall Height: 10.7 INCHES socket to socket length 6.88 INCHES hole pattern See Drawingsplate size Top Plate: 6.25 INCHES x 2 INCHES Bottom Plate: 3.68 INCHES Diameterball size D Size (2.25 INCHES )weight capacity Standard Use: 6 lbsHeavy-Duty Use: 5 lbsmaterials Marine-grade aluminumpackaging type Retail BoxWeight 4.25 lb Additional Information The 6.25 INCHES x 2 INCHES rectangle base is a universal mounting bracket with a selection of mounting hole locations. In certain applications additional holes may need to be drilled for proper fit with your electronic device. product dimensions Overall Height: 10.7 INCHES socket to socket length 6.88 INCHES hole pattern See Drawings plate size Top Plate: 6.25 INCHES x 2 INCHES Bottom Plate: 3.68 INCHES Diameter ball size D Size (2.25 INCHES ) weight capacity Standard Use: 6 lbsHeavy-Duty Use: 5 lbs materials Marine-grade aluminum packaging type Retail Box Weight 4.25 lb