Check the listing for details. RAM-B-101-G3U RAM Double Ball Mount with Hardware for Garmi.... Color: Black, Condition: New. Listed at 48.44 USD. RAM Double Ball Mount with Hardware for Garmi... RAM-B-101-G3U Genuine RAM Products! hardware included (2) #6-32 x 3/4 INCHES Machine Screws(2) #6-32 x 5/8 INCHES Machine Screws(4) #6-32 Nut Insertsproduct dimensions Overall Height: 5 INCHES socket to socket length 3 INCHES hole pattern 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES 3-Hole 120-Degree: 1.812 INCHES Diameterplate size 2.5 INCHES Diameterball size B Size (1 INCHES )weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lbmaterials Marine-grade aluminumpackaging type Poly BagWeight 0.58 lb product dimensions Overall Height: 5 INCHES socket to socket length 3 INCHES hole pattern 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES 3-Hole 120-Degree: 1.812 INCHES Diameter plate size 2.5 INCHES Diameter ball size B Size (1 INCHES ) weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lb materials Marine-grade aluminum packaging type Poly Bag Weight 0.58 lb