Corrosion-resistant plastic parts. Equipped with EPDM seals for use with alkaline liquids. Light and sturdy, translucent tank with easily visible fill volume graduation marks and large opening. Smooth, sealed pump with large pump handle for quick and efficient pressurization to maximum 45 psi. Automatic pressure relief valve releases pressure at 45 psi and can be manually operated to empty container. Large ergonomically-shaped handle. Special, adjustable flat spray nozzle with "varioFOAM" foaming function. The embossed graduation offers exact adjustment possibilities: Dry: The foam is drier and, therefor, more consistent. Wet: A gel-like foam with higher moisture content is produced.