[Mute and stop scratches] The height of the constant ft of office chair glides is close to the height of the mounting feet. It is acceptable for stopping the air pressure rod from damaging the floor. [Suitable for all types of floors]Fixed desk bound castors have good traction, preserve steadiness on comfortable surface surfaces (wood, tiles, laminates), present bigger traction than casters, and decrease friction, vibration and noise. [Excellent caster replacement]Replacement glides are suitable for various swivel chairs (executive chairs, office chairs, game chairs, tables and chairs)very suitable for you to roll the stool or office chair right into a extra steady fixed type. [Efficient installation]Replacement office chair wheels are easy to install and remove, no screws are required, simply seize the previous casters and pull them out. Then push chair wheels substitute into the holes. Good traction for tender movements: These sliding devices maintain steadiness on smooth floor surfaces (such as wood, tiles, and laminates) while providing bigger traction than casters. Easy to install: is really easy to put in with none tools. Safer than casters: By keeping off the "rolling chair effect" when getting up from a desk or desk, a more secure seat is supplied for folks who've challenge getting in and out of the chair. Protect your carpet: will not chew carpet like some well-known casters. -perfect for extraordinary situations: excellent for shifting surfaces, equivalent to boats and RVs, and flooring that aren't too flat. Heavy-Duty & Super Quiet Fixed casters have good traction, keep steadiness on a gentle surface surface, and supply bigger traction than casters. In addition, we additionally give away 5 foot pads to help you minimize friction, vibration and noise. Colour: black Material: nylon Size: Base diameter 52mm, plunger: 11x22mm, installation peak 35mm Package Contents: five * Swivel chair constant casters 5 * Foam pads Only the above kit content, different products usually are not included. Note: Light taking pictures and various exhibits could cause the color of the object in the picture a bit of diverse from the real thing. The size allowed error is +/- 1-3cm.