RAM® Universal Marine Electronic Mount - B Size Medium RAM-114RM The RAM-B-121U-A-238 consists of a

The RAM-B-121U-A-238 consists of a yoke clamp base

an 18 inch NPT metal pipe with a 6 inch double socket arm attached to it and finally a 2

The RAM-B-111U-A consists of a short double socket arm

bottles or mugs ranging from 2

31" diamond base with 2 hole AMPS pattern and a strap clamp base for rails between 1" and 2

RAM® Universal Marine Electronic Mount - B Size Medium RAM-114RM The RAM-B-121U-A-238 consists of aThe RAM B 111U consists of a medium double socket arm, 2. 5" diameter round base, and 6. 25" x 2" rectangle base. The round base includes a 1" B size rubber ball and contains pre drilled holes, including the universal AMPS hole pattern. The rectangle base also includes a 1" B size rubber ball and contains a variety of pre drilled holes that are compatible with several marine electronic devices, including fishfinders and chartplotters.