Based on this product's specifications, here are some alternatives and similar models
Rockforce / WMC foam lance for pressure washer RF-BT06 1 L, max. 275 bar
Summary description:
Foam lance for pressure washers Rockforce / WMC RF-BT06 with 1 L reservoir and maximum operating pressure 275 bar. Designed to apply detergent foam evenly for car washing, exterior cleaning and pre-wash treatment. Features a screw-on bottle, adjustable nozzle for foam density and compatibility with most lance fittings. Useful for workshops, car detailers and home use.