RAM® Handlebar U-Bolt Double Ball Mount for Lowrance AirMap 600C + More GPSMAP 66st The RAM-109H-2B-B-LO11 consists of a

The RAM-109H-2B-B-LO11 consists of a 6" long straight swing arm mounted on a horizontal surface mounting base

The RAM-B-138-AP10U consists of a double socket arm

The RAM-101-SAE1 consists of a 6 inch double socket arm

Thread length is

RAM® Handlebar U-Bolt Double Ball Mount for Lowrance AirMap 600C + More GPSMAP 66st The RAM-109H-2B-B-LO11 consists of aThe RAM B 149Z LO3U consists of our medium length B size arm with our Handlebar U Bolt Base for Rails 0. 5" to 1. 25" in Diameter and our form fitting cradle for several Lorwance devices. A complete list of compatible devices can be found in the compatibility section below.