Check the listing for details. RAM-111U-D RAM Universal Marine Electronic Mount - C Siz.... Color: Black, Condition: New. Listed at 89.44 USD. RAM Universal Marine Electronic Mount - C Siz... RAM-111U-D Genuine RAM Products! The RAM-111U-D consists of a 2.5 INCHES diameter round base that contains the universal AMPS hole pattern, 9 inch double socket arm and 6.25 INCHES x 2 INCHES rectangle base. The rectangle base 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.product dimensions Overall Height: 10.85 INCHES socket to socket length 8 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 2.25 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: 10.85 INCHES socket to socket length 8 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 2.25 lb