40MM SINGLE BLOCK STAND -UP

A20401SLZ – 40mm Dynamic Single Stand Up Block | New 2023 | High-Performance Block for Keelboats & Dinghies

New for 2023, the A20401SLZ 40mm Dynamic Single Stand Up Block is built from high-strength, lightweight glass-loaded nylon and combines Allen's renowned dynamic bearing technology to deliver a high-performance block perfectly suited for keelboats and dinghies.

Ideal for use on main, jib and spinnaker sheets on dinghies, as well as keelboat control lines, the A20401SLZ is the perfect solution for any application where the block needs to remain upright and ready for use at all times.

Patented Bearing System – Dynamic Block Technology Dynamic Blocks feature an exclusive patented bearing system using twin rows of stainless-steel ball bearings running on a stainless-steel rail. The ball bearings are caged for further friction reduction, delivering superior load-carrying capacity and outstanding longevity compared to conventional bearing systems on the market.

Stand Up – Spring-Loaded Upright Positioning This block is assembled around a lacing eye and uses an internal spring to hold it permanently upright. Ideal for deck-mounted spinnaker halyard blocks or any other control line application where the block needs to stand up and remain accessible at all times.

Becket – Versatile Tie-Off Point The 40mm range features a large central hole that can be used as a becket tie-off point for added versatility