Hoover Concepts

Harken 40mm Carbo 2-Disc Block


This series is particularly suitable for wall points with an AutoRelease plate as well as for delayed wall points, roof points, tree points and ground points of all HOOVER Concepts® semi-permanent sail covers. If you are unsure of the type of pulley you need, compare your current pulleys with the images.

Glass fiber strong plastic side plates ensure a compact block with very high strength and a very low weight. The discs rotate on high-quality ball bearings in a recessed ball track so that there is as little friction as possible. The ball bearings, discs and side plates of the block contain carbon powder for excellent protection against UV radiation.


  • Can withstand sun, salt and knocks.
  • Plastic side plates for light weight and high strength
  • Tough composite bearing disc resists corrosion for a very long service life.
  • Shackles are strong, corrosion resistant and stainless steel.
  • Swivel blocks can be locked in two directions, without this lock the blocks can rotate 360 degrees.
  • Maximum working load is 220 kilograms
  • Breaking strength is 735 kilograms