Allen 38mm Single Plain Bearing Block Apparel & Personal Gear The sheaves face opposite directions

The sheaves face opposite directions to allow two control lines to run at a maximum of 180 degrees to each other

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

Manufactured from nylon featuring plain bearing sheave

The removal of ball bearings offers a further weight reduction

It's lightweight and strong

Allen 38mm Single Plain Bearing Block Apparel & Personal Gear The sheaves face opposite directionsAllen Single Ball Bearing 38mm Block This is an upgraded version of the classic Laser mainsheet block used in the middle of the Laser boom to guide the mainsheet back from the boom to the deck. This block is Laser class legal. Manufactured from nylon and features a ball bearing sheave for reduced friction. Originally designed for the Laser dinghy mainsheet system this classic block has also become the block of choice for many other dinghy mainsheet