The telescopic spray gun extension kit is a common accessory in cleaning machinery. It is mainly used for cleaning walls and roofs. This product usually extends in two or three sections. The longest extended length can reach more than 7 meters after being extended, so it can clean farther or higher locations. The outer layer of the extension rod is usually made of fiberglass, and the inner two layers are generally made of aluminum alloy. This material is light, strong, tough, and corrosion-resistant, making it an ideal material for making telescopic extension rods. The innermost part is a high-pressure hose. After the high-pressure water flows out of the pump, it flows through the high-pressure hose and is sprayed out from the front nozzle to wash the wall or roof. The product can withstand a pressure of 280 bar, which is enough to clean stubborn dirt on the wall.