The Glider"s newest design is slimmer so that you can clean glass in narrow spaces. The New Glider is the only window cleaner with four squeegees, 2 on each side, which ensures excellent results! The Adjustable Force Control allows you to adjust the magnetic grip according to the thickness of the window, allowing a smoothe and easy operation.Includes 2 microfiber polishing cloths.For single panes between 1/8"-3/8" (3-10mm).GLIDER SLIM MAGNETIC SINGLE PANE WINDOW CLEANER (S-1 Black knobs)