RAM AQUA WATERPROOF BOX with Motorcycle, Motorbike, Bike, Bicycle Handlebar Mount RAM-B-149-AQ6U (SKU 3561) Keep your SatNav system completely protected & dry in bad weather, suitable for most GPS systems TomTom, Garmin, Navman etc. Aqua Box 6 Internal Dimensions: width=4 inches(100mm) height=6 inches(152mm) depth=1.75 inches(44mm) / External dimensions: width=5.25 inches(133mm) height=6.5 inches(165mm) depth=2 inches(50.8mm) Flex-Lens enables buttons to be accessed through the lens. Supplied with a RAM handlebar mount that consists of a zinc coated u-bolt accommodating 3/4" to 1" rails. Arm from U-bold measures 3 inches to the centre of the AquaBox.