The Barton TUPHblox Size 4 double block with swivel is a heavy-duty marine pulley block crafted from classic Tufnol laminate. The freely rotating swivel head allows the block to self-align with the load direction, preventing rope twist and friction. Featuring dual sheaves, it offers high efficiency for multi-purchase setups under demanding loads.
Key Features:
Type: Double block with swivel head
Sheave Diameter: 58 mm
Max Line Diameter: 14 mm
Material: Premium Tufnol (TUPHblox) with stainless steel side straps for UV and weather resistance
Application: Ideal for mainsheet systems, halyards, and heavy control lines on sailboats and traditional vessels
