Strong absorbency: The baffect window cleaner is effective for single and double glazing thickness 18-30mm. Please make sure that your window thickness is within 18-30mm.You can clean the inside and outside of the window just by standing in the house.Clean double side of the window at the same time: Stay in the room to clean the inside and outside window at the same time because of the magnetic design.Ideal for home windows, greenhouses, car windows, conservatories etc.Please measure the thickness of the window glass before buying. Measure the total thickness of window frame, and the outside and inside thickness of window frame. the real thickness of window glass = the total thickness of window frame - outside thickness of window frame - inside thickness of window frame.Super Quality: Ultra-Strong ABS, ferro-boron alnico and rubber strip. Its practical, solid, anti-drop and durable. Please be careful not to pinch your fingers while in use, this is very very important.Product size (L * W * H): 16 * 13.5 * 7cm. The window cleaner is suitable for single and double glazing with a total thickness of 18-30 mm and not for triple glazing. If you are not sure what the thickness of your window is, we recommend that you choose the 4-30mm adjustable magnetic window cleaner.