Block triple Organic with swivel 57mm
Holt
Article number :  HT99030
or boom
Triple ball bearing pulley diam 57 mm.
Ideal as a catamaran HS hoist coupled with the pulley ref: 7737
Max. sheet diameter: 12 mm
Max. working load: 400 kg
Breaking load: 600 Kg
Pulley weight: 241 g