This arm has been used on only one trip.
It can be seen on Sea and Sea's website
http://www.seaandsea.com/trays.html
New Sea Arm V (#29051)
Enlarged ball joints provide unfettered multi-directional movement. Oversized knurled knobs with slip-proof grip provide better handling and a more secure assembly. Crafted of lightweight aluminum for optional flexibility, it's an extremely well balanced, versatile system for all types of underwater photography. For use with most strobes and video lights.
I will take $100US
I also have a 4 pin Sync Connector by Sea and Sea used on only 1 trip
It can be seen at
http://www.seaandsea.com/synccords.html
4 Pin Dual Sync Connector for MMII-EX and SX-100 Housing (#03460)
Compatible with S series or Duo strobes (with sync cord #17200) for TTL flash photography. Not compatible with YS-350TTL PRO
I will take $100US
email todd.mintz@accesscomm.ca if interested 
