Merlin and Guardian chain adjusters and trolleys are interchangeable, the only difference being which side of the pole the chain adjuster sits.
There are two versions pictured, either one will work as the diameter and throat size are the same.
We will supply whichever is in stock at the time.
SUITS MERLIN 230T/MT5580P/MT60P and GUARDIAN/BOSS 21230L OPERATORS.
This is a used part but structurally sound