Check the listing for details. RAM-111U RAM Drill-Down Marine Electronic Mount.... Color: Black, Condition: New. Listed at 71.44 USD. RAM Drill-Down Marine Electronic Mount... RAM-111U Genuine RAM Products! The RAM-111U consists of a medium double socket arm, 2.5 INCHES diameter round base, and 6.25 INCHES x 2 INCHES rectangle base. The round base includes a 1.5 INCHES C size rubber ball and contains pre-drilled holes, including the universal AMPS hole pattern. The rectangle base also includes a 1.5 INCHES C size rubber ball and contains a variety of pre-drilled holes that are compatible with several marine electronic devices, including fishfinders and chartplotters.product dimensions Overall Height: 7.35 INCHES socket to socket length 4.66 INCHES hole pattern 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES 3-Hole 120-Degree: 1.812 INCHES DiameterSee Drawingplate size Rectangular Plate: 6.25 INCHES x 2 INCHES Round Plate: 2.5 INCHES Diameterball size C Size (1.5 INCHES )weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbsmaterials Marine-grade aluminumpackaging type Poly BagWeight 1.26 lb Additional Information The included plate 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: 7.35 INCHES socket to socket length 4.66 INCHES hole pattern 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES 3-Hole 120-Degree: 1.812 INCHES DiameterSee Drawing plate size Rectangular Plate: 6.25 INCHES x 2 INCHES Round Plate: 2.5 INCHES Diameter ball size C Size (1.5 INCHES ) weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbs materials Marine-grade aluminum packaging type Poly Bag Weight 1.26 lb