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 2 US GPM) Material Materials

2 US GPM) Material Materials in Contact with Liquid: Glass-filled polypropylene

Manufacturer Part Number: 7049-BSS

automatic operation

ISO 15027-1 compliant

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 2 US GPM) Material Materials40mm 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