Harken Aluminum Swivel Block - 57mm Navigation Durable hardened cutting edge for

Durable hardened cutting edge for long life in tough materials

Internationally approved navigation lamps

Piloting in a Cross Current

1-1/4" sizes and larger include one grease zerk fitting (can be used for lubrication or for draining)

1-1/4 PLASTIC PIPE TEESpecifications: Category: Plastic Fittings

Harken Aluminum Swivel Block - 57mm Navigation Durable hardened cutting edge forThe entire line of Black Magic Air blocks 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 Black Magic blocks, the three way head swivels locks in front side positions. Blocks are easily disassembled with a single hex wrench.