Overall glide height: 2 inches general float top when installed, matches for most small chair casters; This stool workplace chair bell glides can convert office chair with casters right into a desk bound chair without wasting the chair height.Dimension of insert stem: the traditional 7/16 x 7/8 inch (11 x 22 mm) grip ring mounting stem to connect to most standard chair or stool bases, Suitable size can meet your needs; Please measure your size before purchasing.Bell glides size: those bell glides are 2 inch in backside width and a couple of inch general drift height, such as most small chair casters.Practical design: with stable PU structural glides design, can handle more weight on most of desk chairs, workshop chairs or some other stools, etc., black top with gray bottom can also smooth to compare diversified chairs.WILDLY USED: It can be used as the desk bound castors on wood, metallic and tubular steel chairs, furniture and other package to constant them well.Colour: black, grayMaterial: PU, metalSize: about 52mmPackage Contents:5 * Fixed Stationary CastorsOnly the above kit content, different merchandise should not included.Note: Light shooting and various exhibits could cause the color of the article within the photo slightly different from the genuine thing. The measurement allowed error is +/- 1-3cm.