Humanscale Ergonomic Foot Rocker (FR300)

Constructed of a solid hardwood platform with a steel frame, phenolic side supports, rubber pads and plastic knobs Ball-bearing rollers encourage rocking motion 3" height adjustment Non-skid, inset pads Rubber feet protect flooring Dimensions: 16" W x 11.875" D Height range: 3.75" to 6.75" Natural Wood Finish