![Harken 40mm Carbo Air Double Fixed Block w/Becket [2643]](https://www.micrometerx.com/wp-content/uploads/2025/8/1756622832/harken-40mm-carbo-air-double-fixed-block-w-becket-2643.webp)
Description
40mm Carbo Air Double Fixed Block with Becket
Low-friction Carbo Air blocks are lightweight, strong, reliableand 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 (mm)40 mm
- Sheave (in)1 9/16 in
- Maximum line (mm)10 mm
- Maximum line (in)3/8 in
- Maximum working load (kg)440 kg
- Maximum working load (lb)970 lb
![Wichard Soft Snatch Block – 12mm Rope Size [36020]](https://www.micrometerx.com/wp-content/uploads/2025/8/1756623209/wichard-soft-snatch-block-12mm-rope-size-36020.webp)
![Schaefer Twin Sheet Lead 25x3MM – Black [32-77]](https://www.micrometerx.com/wp-content/uploads/2025/8/1756622922/schaefer-twin-sheet-lead-25x3mm-black-32-77.webp)
![Wichard Soft Snatch Block – 16mm Rope Size [36030]](https://www.micrometerx.com/wp-content/uploads/2025/8/1756623209/wichard-soft-snatch-block-16mm-rope-size-36030.webp)
![Ronstan Series 30 Ball Bearing Block Single Becket Option Lashing [RF35109HL]](https://www.micrometerx.com/wp-content/uploads/2025/8/1756622821/ronstan-series-30-ball-bearing-block-single-becket-option-lashing-rf35109hl.webp)