Manufacturer part #: 3221
Technical Description
57 mm HL Footblock w/Lockoff
2 1/4 in
57 mm
3 5/16 in
84 mm
1 in
25 mm
5.44 oz
154 g
7/16 in
12 mm
2500 lb
1134 kg
5000 lb
2268 kl
4 x 1/4
4 x 6
Manufacturer part #: 3221
Redesigned with a sleek look the Black Magic Air blocks has their same unique, performance-packed engineering as ever.
Feature Torlon® roller bearings which stay parallel for low-friction efficiency housed in a center cage; the block carry some of the highest loads imposed by running rigging.
Sculpted hardcoat-anodized aluminum sideplates protect sideload ball bearings. Blocks are easily disassembled with a single hex wrench. Dissimilar metals are isolated to minimize corrosion.
Either metric or imperial flathead fasteners may be used for mounting and are not exposed.
Redesigned with a sleek look the Black Magic Air blocks has their same unique, performance-packed engineering as ever.
Feature Torlon® roller bearings which stay parallel for low-friction efficiency housed in a center cage; the block carry some of the highest loads imposed by running rigging.
Sculpted hardcoat-anodized aluminum sideplates protect sideload ball bearings. Blocks are easily disassembled with a single hex wrench. Dissimilar metals are isolated to minimize corrosion.
Either metric or imperial flathead fasteners may be used for mounting and are not exposed.