The RAP-SB-187GLU RAM EZ-Strap High Strength Plastic Composite Handlebar LONG Rail Bike Mount consists of the RAM EZ-Strap base connection with a LONG dual friction ball connection to a Garmin 17mm G-Ball. The mount base will fit all handlebar shapes and sizes using the adjustable EZ-Strap. When connected, the G-Ball connects to the socket found on the back of your Garmin GPS cradle.