Parts and accessories include eyewash spray head assemblies, shower handles, replacement valves and eyewash dust caps. Many emergency shower and eyewash station parts come in plastic and metal forms. Stainless steel eyewash bowls are corrosion resistant and easy to clean, while plastic eyewash bowls are impact resistant and corrosion resistant. Various carts are available with sturdy casters to transport eyewash units and wastewater. Other accessories include foot treadles, stem assemblies, spacers and flow restrictors. Retrofit dust covers protect eyewash bowls from outside contaminants such as dust and debris.