RAM® Diamond Ball Adapter with Hardware for Delphi & Sirius Radios RAM-B-166-C-UN10 The RAM-B-138U consists of a

The RAM-B-138U consists of a medium length B size 1" double socket arm

The RAM-B-174-TO10U consists of a double socket arm

This kit includes a B size RAM® diamond ball base with a universal hardware pack that accommodates the seat track on most major wheelchair brands

allowing access to audio jacks

The RAM-247U-2 consists of a 2" clamp base with 1

RAM® Diamond Ball Adapter with Hardware for Delphi & Sirius Radios RAM-B-166-C-UN10 The RAM-B-138U consists of aThe RAM B 238 XM1U consists of a 1" ball and diamond plate which contains a double hole spacing of 1. 91 inches (48. 5mm). Included is hardware that will attach directly to the back of your Delphi or Sirius radio.