Brand: OfficeWorld RangeFeatures: PRODUCT: Aluminum base in chrome for your office chair or swivel chair. Extra stable for a comfortable seating area. Suitable for all common gas pressure springs with a 50 mm gas spring mount.INSTALLATION: This base fits on chair castors or glider holders 11mm - castors for hard floors or carpet casters can also be purchased in our shop (delivery of this product does not include chair castors and gas spring)TECHNICAL DATA: The turnstile is TÜV & GS tested - Dimensions base: Diameter: 680 mm Height: 80 mm Center hole diameter: 50 mm Diameter for pin of the rollers: 11 mm Load capacity up to 120 kgQUALITY and STRENGTH: High-quality office chair replacement parts. Extra stable for a comfortable seat. Manufactured in convincing quality, our office chair bases can withstand continuous use without any problems.COMPATIBILITY: The base replacement part is suitable for all office chairs, swivel chairs or executive chairs (for example Topstar, Nowy Styl, Mayer, Easychair, IKEA, etc.)