Harken 57mm Aluminum Low Load Black Magic Block w/Swivel [3226] Automotive/RV clearer view of the bottom

clearer view of the bottom structure than contour lines alone

Ports shaped for drilling accuracy (8-liter and 20-liter tanks only)

such as powering on/off specific systems or switching between different modes like "Sleep Mode"

and 3D holographic eyes

Proudly made in the USA

Harken 57mm Aluminum Low Load Black Magic Block w/Swivel [3226] Automotive/RV clearer view of the bottom57mm Aluminum Low Load Black Magic Block with Swivel Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. A center cage keeps Torlon roller bearings separated and parallel to reduce friction. Shackle blocks lock in two directions or swivel to keep the line from