Revvo Caster Company (West Seneca, NY) offers ET Series casters designed to move moderate loads via manual propulsion. Four-inchdiameter swivel models are available with an optional fixed-position brake that mounts to the top plate so the brake is always in the same position regardless of which way the swivel wheel is facing. The swivel models feature a double-ball raceway for smooth directional movement with the capability to withstand shock loading. Fixed and swivel models are available in wheel sizes of 4" and 5" diameter with load capacities ranging from 264 to 550 pounds. Wheel types include polyurethane-on-nylon with roller bearings, and black nylon or blue rubber with precision ball bearings. Fixed models have an oblong top plate. Swivel models are available with either a special top plate for the fixed-position brake (4" diameter models only), or a standard top plate. Accessories include wheel locks for standard swivel models and thread guards to prevent debris from binding the wheel.