Gorilla Ultra Glides contain a hard wearing insert specially formulated to allow furniture to slide effortlessly and without noise on all surfaces. Fits legs with a 19mm diameter. Smooth and quiet sliding, ultimate floor protection. Slipstick Gorilla Furniture Glides Warm Grey has tapered edges prevent catching on uneven surfaces. Slide furniture easily, ideal for both carpet and tiles. Comes with a 5-year warranty. Installation quick stick or screw on.