Note: To determine the correct size, measure the outer dimension (diameter) of the leg. You can use our convenient measuring tool for this.Product InformationRound insert caps with tilting foot and Teflon gliding surface are for chair legs with tube diameters from Ø18mm to Ø28mm. Maximum angle: 22ºSize Chart (mm) Outer Dimension Inner Dimension 18 14 - 15 19 15 - 16 20 16 - 17 22 18 - 19 25 21 - 22 28 24 - 25 These floor gliders/chair caps are noise-reducing due to the rubber/teflon gliding insert. The Teflon has good gliding properties and is suitable for use on carpet and floor covering. These caps are very suitable as leg caps under chairs with angled legs as often used in project furnishing, hospitality, hospitals and schools.Material: cap - PE (Polyethylene), gliding surface - PTFE (polytetrafluoroethylene), Connecting element - SteelColor: black