The Allen A2020Ti3 is a 20mm single tie-on dynamic block designed for use in water sports, with origins in the paragliding and kiting industries. Its wider opening and flat sides, along with low friction and quick rolling action, make it ideal for smaller diameter lines. Despite its improvements, the block maintains the same footprint as its predecessor, the A2020Tii. The patented bearing system, featuring twin rows of stainless steel ball bearings on a stainless steel rail, offers superior strength and durability compared to systems that use plastic rails. With a large central rivet and compatibility with 1.0 ropes, this block is perfect for use in cascade systems.