No detail has been overlooked in our redesign of the ProSeries Pulleys.Built workhorse tough to deliver years of dependable service, these HD (Heavy Duty) Pulleys are loaded with enhanced features. Large high-efficiency anodized aluminum sheave High-strength sealed bearings that minimize loss of mechanical advantage and will deliver optimum performance haul after haul Side plates constructed of machined aircraft-grade aluminum,withsmooth rounded edges to minimize rope wear Wide attachment point that supports multiple rescue-size carabiners PMP (Prusik-Minding Pulley) bottom shaped for maximum efficiency with Prusik hitches and also works well with mechanical rope-grabs Note: Do not load a single side only of a double-sheave pulley. Specs Type: HD2 item # 300441 Product Weight 367 g (13 oz) Sheave Tread Size 57 x 13 mm (2-1/4 x 1/2 in) Pulley Dimensions (H x W) 14.5 x 10.75 cm (5-3/4 x 4-1/4 in) Type Single Color Gray NFPA Rating General Use 3 sigma MBS 56 kN (12,588 lbf) Type: HD2 Double item # 300442 Product Weight 605 g (1.3 lb) Sheave Tread Size 57 x 13 mm (2-1/4 x 1/2 in) Pulley Dimensions (H x W) 16.5 x 9.5 cm (6-1/2 x 3-3/4 in) Type Double Color Gray / Red NFPA Rating General Use 3 sigma MBS 56 kN (12,588 lbf) Type: HD4 item # 300461 Product Weight 850 g (1.9 lb) Sheave Tread Size 95 x 13 mm (3-3/4 x 1/2 in) Pulley Dimensions (H x W) 19.75 x 14 cm (7-3/4 x 5-1/2 in) Type Single Color Red NFPA Rating General Use 3 sigma MBS 46 kN (10,340 lbf)
