1. High quality PVC wire, with acid resistance, alkali resistance, anti-corrosion, anti-static, can absorb very small particles and other characteristics. The top of the bristle is fluffy with moderate rigidity and softness to avoid damaging your solar panel.
2. The water control switch is a rotary switch, and the amount of water is controlled by you
3. Aluminum rod material, adjustable length. Make it convenient and easy for you to clean your solar panel brush