Are you still having trouble climbing a ladder to clear high windows? With this window cleaning brush, you can clean windows from the ground up faster and safer than ever. This is a retractable cleaning system that can be attached to a water tap or garden hose. SPECIFICATION: Product name: Photovoltaic panel cleaning brush Material: Aluminum alloy Brush width: 32CM Locking method: Lock design Size: 3.6M/12FT, 5.4M/18FT, 6M/20FT, 7.2M/24FT, 9M/30FT, 10.8M/36FT Applications: Window Cleaning, Photovoltaic Panel Cleaning, Exterior Cleaning of Buses, Large Vehicles, Trucks, Trucks, Caravans, Boats, etc. Products include: Telescopic rod*1, brush head*1, adapter*1, 10cm water pipe*6, EN-copper quick connector*1, plastic quick connector*1, faucet quick connector*1, 12M water pipe*1, 8M water pipe*1 , Hose connector*4, M4 screwdriver*1 Points to note: Due to different measurement methods, a measurement error of 1-2 cm is a normal phenomenon. 2. After-sales service: If you have any questions, please contact us in time, we will reply you within 24 hours and give you a satisfactory solution.