Description
40mm Carbo Air Block with Cam Cleat & Becket
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 Ø (mm)40 mm
- Sheave Ø (in)1 9/16 in
- Maximum line Ø (mm)6 mm
- Maximum line Ø (in)1/4 in
- Maximum working load (kg)136 kg
- Maximum working load (lb)300 lb

![Harken 40mm Carbo Air Block w/Cam CleatBecket [2646]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/harken-40mm-carbo-air-block-w-cam-cleatbecket-2646.webp)




![Ronstan Series 55 Ratchet Mount Orbit Block - Fiddle Becket Swivel [RF56510]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/ronstan-series-55-ratchet-mount-orbit-block-fiddle-becket-swivel-rf56510.webp)
![Ronstan Series 20 Ball Bearing Block- Single, Stand-Up Loop Top [RF20141]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/ronstan-series-20-ball-bearing-block-single-stand-up-loop-top-rf20141.webp)
![Ronstan Series 30 Ball Bearing Block - Single - Loop Top [RF30101]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/ronstan-series-30-ball-bearing-block-single-loop-top-rf30101.webp)
![Ronstan Kite Block - Black w /White Sheave (Pair) [RF13101-2]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/ronstan-kite-block-black-w-white-sheave-pair-rf13101-2.webp)