RAM® Track Ball™ Base with T-Bolt Attachment - B Size RAM-B-121-AP20U The provided speaker connects to

The provided speaker connects to the Sonim usit using an included 10-pin to 3

Sizing inserts are included to provide a snug fit and offer additional protection for the rail

This mount has a three hole pattern which will connect to the base of the Garmin Marine GPS unit swivel mounts

The B-size adapter will work with the RAM Mounts gear you already have

this adapter joins to base plates with the screws provided and turns the flat base into a rail base

RAM® Track Ball™ Base with T-Bolt Attachment - B Size RAM-B-121-AP20U The provided speaker connects toThe RAM Track Ball consists of a B size 1" rubber ball molded to a high strength composite base, a rubber friction washer, and a stainless steel T bolt for sliding into virtually any track system. Simply insert or slide the RAM Track Ball into your track and twist the ball clockwise to tighten in place. Twist counterclockwise to loosen or adjust the ball.