Check the listing for details. RAM-B-184U-A RAM Handlebar U-Bolt Mount for Garmin zumo 40.... Color: Black, Condition: New. Listed at 50.44 USD. RAM Handlebar U-Bolt Mount for Garmin zumo 40... RAM-B-184U-A Genuine RAM Products! The RAM-B-184U consists of a zinc coated u-bolt base, double socket arm and 2 INCHES x 1.7 INCHES rectangular base that contains the universal AMPs hole pattern. The diamond adapter base has a hole pattern that matches the industry standard AMPS hole pattern and will connect to a large variety of RAM Mount and third party cradles. Included in this package is hardware that will accommodate rails from 0.50 INCHES to 1.25 INCHES in diameter. A composite rail adapter can narrow the rail to a minimum width of 0.5". The mount is designed with a RAM 1 INCHES diameter patented rubber ball and socket system that has adjustment points at both ends of the short length double socket arm; this allowing for almost infinite adjustment and perfect viewing angles.hardware included (1) 1/4 INCHES -20 U-Bolt for .5 INCHES - 1 INCHES Rails(1) 1/4 INCHES -20 U-Bolt for 1 INCHES - 1.25 INCHES Rails(2) 1/4 INCHES -20 Nylock Nuts(2) Rubber Caps(1) U-Bolt Spacerclamp range .5 INCHES - 1.25 INCHES diametersocket to socket length 1.75 INCHES hole pattern 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES ball size B Size (1 INCHES )weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lbmaterials Marine-grade aluminumpackaging type Poly BagWeight 0.51 lb hardware included (1) 1/4 INCHES -20 U-Bolt for .5 INCHES - 1 INCHES Rails(1) 1/4 INCHES -20 U-Bolt for 1 INCHES - 1.25 INCHES Rails(2) 1/4 INCHES -20 Nylock Nuts(2) Rubber Caps(1) U-Bolt Spacer clamp range .5 INCHES - 1.25 INCHES diameter socket to socket length 1.75 INCHES hole pattern 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES 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 0.51 lb