![[HK-3244] HARKEN 75 mm Aluminum Stand-up Block](http://www.yachtparts.com.au/cdn/shop/products/3244_864ffec6-4083-4530-a5d6-ba7f8b14a80c_1024x1024.png?v=1554367812)
![[HK-3244] HARKEN 75 mm Aluminum Stand-up Block](http://www.yachtparts.com.au/cdn/shop/products/3244_864ffec6-4083-4530-a5d6-ba7f8b14a80c_480x480.png?v=1554367812)
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.
Sideplates and sheaves Hard Lube-anodized for maximum UV protection and a smooth surface. Center cage keeps Torlon® roller bearings separated and parallel to reduce friction.
Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.