Harken FlatWinder 500 Powered Block - 24-Volt Electric Ronstan Nylatron Sheaves Suit most common mast profiles

Suit most common mast profiles

Base Diameter "B" - 200 mm (7 7/8")

by using a 2

Wichard Single 2 11/64" (55mm) Block w/ Swivel Snap Shackle

Ronstan Series 26 Black Track (over 6ft)

Harken FlatWinder 500 Powered Block - 24-Volt Electric Ronstan Nylatron Sheaves Suit most common mast profilesProduct Description Harken FlatWinder 500 Powered Block 24 Volt Electric The Harken FlatWinder powered block is a self contained, low profile electrically powered system for mainsheet traveler adjustment. This powerful block is easy to use and offers sailors huge benefits in mainsail control, giving them the means to quickly depower the rig, and delay reefing when the wind picks up. Like a compact captive winch for the traveler, the FlatWinder is