The RAM-B-176-AQ7-2-I5C consists of a fork stem base, double socket arm, diamond adapter base and AQUA BOX® Pro 20 i5 case. This one of the cleanest ways to mount small electronics on your motorcycle. Simply slide the assembly into the hole of the stem and tighten the machine screw to create a tight fit. This part is designed to fit into the cylindrical bore wall of fork stems and will work with stems that measure from 12 - 38mm (.5” – 1.49”).