Drum fits RMG winch and it is made by RMG Sailwinch under Sailboat RC drawings. It is used in all our bots since the 2014 year as they have proven excellent in our design. This drum has the outside spring in a loop that is keeping the tension. One of the best drum options you can use for IOM yachts.
103 Return Spring and 104 Ring SS included with the Drum.