Description
3173 and 3174 high-load controls allow 2:1 to 6:1 purchases on offshore boats with mainsails over 37 m² (400 ft²). Controls feature 57 mm Black Magic Big Boat ball/roller sheaves and high-load aluminium sideplates.
| Length (in) | 6 7/16 in |
| Sheave Ø (mm) | 57 mm |
| Sheave Ø (in) | 2 1/4 in |
| Length (mm) | 164 mm |
| Width (mm) | 57 mm |
| Width (in) | 2 1/4 in |
| Maximum line Ø (mm) | 12 mm |
| Maximum line Ø (in) | 7/16 in |
| Maximum working load (kg) | 750 kg |
| Maximum working load (lb) | 1650 lb |
| Breaking load (kg) | 1500 kg |
| Breaking load (lb) | 3300 lb |
| Height above track (mm) | 49 mm |
| Height above track (in) | 1 15/16 in |
| Weight for pair (g) | 1169 g |
| Weight for pair (oz) | 41 oz |
| Purchase | 3:1 / 4:1 |
