![Harken 29mm Double Carbo Air Block [381]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/1280x1280/products/28296/36759/79052XL__39552.1646197442.jpg?c=1 "Harken 29mm Double Carbo Air Block [381]")
![Harken 29mm Double Carbo Air Block [381]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/28296/36759/79052XL__39552.1646197442.jpg?c=1 "Harken 29mm Double Carbo Air Block [381]")
29mm Double Carbo Air Block
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming.
Specifications:
- Sheave: 29mm / 1-1/8in.
- Length: 54mm / 2-1/8in.
- Weight: 34g / 1.2oz
- Maximum line: 8mm / 5/16in
- Maximum working load: 299kg/ 660lb
- Breaking load: 737kg / 1625lb
![Harken 29mm Carbo Air Block [348]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/28323/36786/79080XL__73510.1646197502.jpg?c=1 "Harken 29mm Carbo Air Block [348]")
![Harken 29mm Carbo Air Block w\/Swivel [340]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/28322/36785/79079XL__78092.1646197495.jpg?c=1 "Harken 29mm Carbo Air Block w\/Swivel [340]")
![Harken 40mm\/29mm Carbo Traveler Block [2649]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/28527/37126/84445XL__46526.1646201395.jpg?c=1 "Harken 40mm\/29mm Carbo Traveler Block [2649]")