Overall float height: 2 inches total glide peak when installed, suits for many small chair casters; This stool workplace chair bell glides can convert office chair with casters into a stationary chair without wasting the chair height.Dimension of insert stem: the standard 7/16 x 7/8 inch (11 x 22 mm) grip ring mounting stem to attach to most traditional chair or stool bases, Suitable size can meet your needs; Please measure your length before purchasing.Bell glides size: those bell glides are 2 inch in bottom width and a couple of inch general glide height, similar to maximum small chair casters.Practical design: with strong PU structural glides design, can manage extra weight on most of desk chairs, workshop chairs or another stools, etc., black height with grey backside can also clean to check diversified chairs.WILDLY USED: It can be utilized as the desk bound castors on wood, metallic and tubular steel chairs, furnishings and different kit to constant them well.Colour: black, grayMaterial: PU, metalSize: about 52mmPackage Contents:5 * Fixed Stationary CastorsOnly the above equipment content, different products will not be included.Note: Light taking pictures and various displays may cause the colour of the object within the picture somewhat assorted from the real thing. The dimension allowed error is +/- 1-3cm.