Hall Stage rigging blocks by Thern are now available through Hall Stage North America. Available individually or as part of a clew winch rigging kit, the 8SA Series blocks are made of durable lightweight Nylatron, with sheaves housed between two heavy-duty 3/16" steel side plates. Precision ball bearings run on machined steel shafts for smooth, reliable, and nearly silent operation. Designed for use in both single and multi-line setups, blocks are available with 4", 6", and 8" diameter sheaves that range from single groove up to nine grooves. Operators can choose 1/8", 3/16", or ¼" steel wire rope or select sheaves with special grooving for use with fiber rope. Standard mounting frames provide flexibility for various upright or underhung installations, and a selection of universal mounting brackets is also available, including pipe brackets, wall plates, point load brackets, and Unistrut mounting plates. All blocks are finished in satin black.