What is this (Raymarine?) part?

[nigelmercier]

I just bought a new set of cups and wind-vane for my ST60 MHU on eBay, the seller had bought a load of stuff when a chandler closed down. Included in the auction was this black plastic part (picture shows three views):

The seller didn't know if it was related to the MHU, but I'm sure it isn't. Question is, what is it?

It looks a bit like a part of a Raymarine Tiller Pilot, but I've never seen one for real.

 

[Stork_III]

Short arm for MHU?

 

[nigelmercier]

It is nothing like anything I've seen on a ST60 MHU, the arms are metal.

 

[LadyInBed]

if it is a tube, it could be an in line waterproof cable connector cover.
Does it have O rings or glands for the ends?

PS Does it have a part number on it?

 

[nigelmercier]

It is a tube, but quite robust. One end has a slot, so not sure if it would seal. No part numbers.