Harken 353 29mm Double Traveler Carbo Block, Item #353 Round Base Just screw the 2 halves

Just screw the 2 halves together and it's ready to use

Low-friction Bullet blocks lead control lines aft

even when your trolling rod takes a big hit

It installs permanently on the boom and allow you to instantly attach and adjust your sail in high wind and waves

Overall length 17" and is adjustable smaller

Harken 353 29mm Double Traveler Carbo Block, Item #353 Round Base Just screw the 2 halvesHarken 353 29mm Double Traveler Carbo Block, Item #353 Low friction Carbo AirBlocks are lightweight, strong, reliableand affordable. Companions to the popular Harken Black Magic line, these small, compact blocks have very high working loads for safe, easy trimming. The compact 29 mm Carbo is extremely strong. Use our miniature Carbo as a mainsheet block on small dinghies such as the Optimist, or for low friction control blocks on any size boat. Use