This Harken Small Stand-Up Device
is designed for use with 100 mm blocks, where it helps keep the block upright and correctly oriented while sailing.
A practical solution for deck mounting and trim setups where stable block positioning and simple line routing are important.
Key features
For use with 100 mm blocks
Keeps the block upright
Suitable for maritime trim and deck solutions
Harken quality for sailboats
Formerly known as HBB30