Selden Top Swivel with Guide.
The Selden top swivel is used on numerous dinghies and features low friction stainless ball bearings to prevent the halyard from twisting and reduce friction.
The guide separates the jib from the forestay to prevent the forestay from being twisted with the luff of the jib.
Specification:
Top Swivel Height: 35mm
Top Swivel Guide Length: 100mm
Swivel Hole Diameter: 5.5mm