The 65mm Moebius white furniture castor with twin wheels and h a rounded out hollow core. The perfect finishing touch to a simple yet sophisticated office chair. Easily apply this furniture caster with the M10 circlip fitting. Although these are common as office chair castors, they're also perfect for clean design furniture pieces which require wheels for functionality or style! 65mm Moebius White Office Chair Castor with M10 Circlip