FF4 max wire 7/32", max turnbuckle 3/8"

CDI roller furling gear by Cruising Design were the first on the market with a flexible full length luff extrusion.  Ideal for trailer sailing they are a true roller furling, roller reefing system.  These units are unique as they have their own jib halyard and do not use an upper sail swivel.  The FF4 has a maximum stay length of 33'