Allen 40mm Single Block with Swivel Head & AL-0077 Cleat Select (See Table Below):AL-20401-77 40mm Single Block with Swivel Head & AL-0077 Cleat - EACH The unit is fitted close

The unit is fitted close to the mast base to accept halyards

The SAS Extension tubes are designed to fit the HD range on wheel clamp and on steel wheels where the rims are dished

Manufacturer Part Number: 7049-BSS

Material Zinc Primary Construction Zinc Style Pear Anodes Suitable For Salt Waters Fixing Bolt-On Brand AG

1") Diameter Description 400mm (15

Allen 40mm Single Block with Swivel Head & AL-0077 Cleat Select (See Table Below):AL-20401-77 40mm Single Block with Swivel Head & AL-0077 Cleat - EACH The unit is fitted close40mm Single Block with Swivel Head & AL 0077 Cleat Made from high strength, lightweight glass loaded nylon and featuring Allens dynamic bearing technology for a high performance block suitable for keelboats and dinghies. 40mm dynamic blocks are perfect for use on main, jib and spinnaker sheets on dinghies and keelboat control lines. Bearings Dynamic blocks feature Allen's patented bearing system which uses twin rows of stainless steel ball bearings