Allen 30mm Dynamic Single Block Apparel & Personal Gear The Aerovane features a built-in

The Aerovane features a built-in counterweight which ensures accurate indication of apparent wind angle

Allen 30mm Flip Flop Block

which is common amongst other styles

The Aerovane can be removed by pulling with force from the rod

Allen 30mm Dynamic Single Block Apparel & Personal Gear The Aerovane features a built-inAllen 30mm Single Dynamic Block. Our Dynamic range is generally the best choice for applications that require constant sheave movement. Bearings Dynamic Blocks feature our patented bearing system which uses twin rows of stainless steel ball bearings running on a stainless steel rail. This provides a superior load carrying ability and longevity when compared to other bearing systems which run on a plastic rail. Ultra Strap Our patented Ultra Strap is