HARKEN Premium Sailing 57mm HL Black Magic Air Triple Boat Block, 57mm, Part 3219

The entire line of black magic airblocks has been redesigned with a sleek new look. Their unique, performance-packed engineering remains exactly the same. Carrying some of the highest loads imposed by running rigging, these strong, lightweight blocks feature torlon; roller bearings housed in a center cage. Rollers stay parallel for low-friction efficiency. Sculpted hardcoat-anodized aluminum sideplates protect sideload ball bearings.

• The entire line of Black Magic; AirBlocks; has been redesigned with a sleek new look. Their unique, performance-packed engineering remains exactly the same. These strong, lightweight blocks feature free-rolling high-load Torlon; roller bearings for a high strength-to weight ratio
• Like all AirBlocks;, the three-way head swivels/locks in front/side positions. Blocks are easily disassembled with a single hex wrench
• Sheave Diam (mm)=57 Sheave Diam (in)=2.25 Max Rope Diam (mm)=12 Max Rope Diam (in)=0.5
• BL (kg)=2200 BL (lb)=4850
• MWL (kg)=2200 MWL (lb)=4850