Sold as one unit. (1 unit = 5 each.) Fixed eye. Single. 3" sheave dia. 1/2" max. rope size. 650 lb. working load limit. Steel body and die-cast zinc sheave. Zinc plated to protect against rust & corrosion. Powder metal bushing to extend pulley life & provide smooth operation. For indoor or outdoor use. References National No. 220- 020. Bulk. Manufacturer number: T7550404. SKU #: 5308028. Country of origin: (TBA). Distributed by Campbell Chain/Coopertools.