HARKEN 40mm Teardrop Mastcollar ESP Single Block, 6107 Size_Boats up to 36' High-impact Delrin® sheaves turn on

High-impact Delrin® sheaves turn on polished stainless steel spacers

These weight-saving fairleads are built of 6061-T6 Hard Lube-anodized aluminum for durability

Smooth edges protect your lines from chafing and wear

mainsheet systems

It's specially designed and constructed for long service life

HARKEN 40mm Teardrop Mastcollar ESP Single Block, 6107 Size_Boats up to 36' High-impact Delrin® sheaves turn onCruising ESP blocks complement our existing blocks in looks and function, but are simpler in design and construction. Sheaves feature sleeve bearings to handle high static loads and are ideal for halyards or limited purchase systems on cruising boats. These teardrop mast collar blocks coordinate well with any Harken blocks in a deck layout.