Stackable platform anti-fatigue drainage matting add-on platform stackable anti-fatigue platform mat features a flow-through grated surface to raise employees off wet, slippery floors and help promote safety. Platforms are capable of building out horizontally and up vertically for a completely modular ergonomic work height. Structural foam high density polyethylene platforms resist oils, grease and chemical corrosion. Platforms measure 2-5/8h. Add-on platform is easily assembled without tools using included stacking feet. Add on platforms can be stacked on top of starter platforms or other add-on platforms for increased work height. Platforms are easily connected for side-by-side installation using optional poly clips sold separately.