Check the listing for details. RAM-202U-RYM1 RAM Ball Adapter with Hardware for Raymarine .... Color: Black, Condition: New. Listed at 31.94 USD. RAM Ball Adapter with Hardware for Raymarine ... RAM-202U-RYM1 Genuine RAM Products! The RAM-202U-RYM1 consists of a 1.5 INCHES diameter rubber ball connected to a flat 2.5 INCHES diameter base. The base has pre-drilled holes, including the universal AMPs hole pattern. Included are (3 quantity) (#8-32 x 3/4 INCHES PH PD Mach Screws) and (3 quantity) (#8-32 SS Nylock Nuts) that will connect the RAM-202U-RYM1 to the bottom of all Raymarine Dragonfly Sonar/GPS devices.hardware included (3) #8-32 x 3/4 INCHES Machine Screws(3) #8-32 Nylock Nuts(3) .312 INCHES x .187 INCHES Shoulder Washershole pattern 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES 3-Hole 120-Degree: 1.812 INCHES Diameterball size C Size (1.5 INCHES )weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbsmaterials Marine-grade aluminumpackaging type Poly BagWeight 0.25 lb hardware included (3) #8-32 x 3/4 INCHES Machine Screws(3) #8-32 Nylock Nuts(3) .312 INCHES x .187 INCHES Shoulder Washers hole pattern 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES 3-Hole 120-Degree: 1.812 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 0.25 lb