For leading halyards or control lines internally, Schaefer's exit boxes with stainless steel construction and spacers, plus aluminum sheaves handle high static halyard and reefing loads. The front of the cage is flared to fit curved mast sections with an approximante 3" radius. Takes (6) #10 RH fasteners (5mm).
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm.
www.P65Warnings.ca.gov