This item is used to convert swivel office chair with casters to a stationary chair without losing chair height. Universal to attach to almost all office chair bases. An for office and home furnishings to reduce unwanted movement across hard, tile & laminate floors. Features - Brand: . - ColorBlack - Material: PU. - Package size: 8 x 5 cm (the specific size is shown at the picture). - Similar to the height of most standard chair casters. for office and home furnishings - Used to convert a swivel office chair with casters to a fixed chair without reducing the height of the chair. - Reduce noise, prevents scratching of your floor surface and protects your furniture when furniture is moved. - Just pull your old wheels out and use these bell shape stationary glides to convert a rolling chair to a stationary chair. - Can be used on wood, metal and tubular metal chairs, furniture and other equipment. Package list: 5 x Chairs Glide Castors