Regardless of whether the wheel hub is threaded or circlip type, as long as the plunger length is 23mm-26mm and the plunger diameter is 8mm, this rodless caster would be used.Suitable for many office chair furniture, easy to install, the wheels are product of polyurethane and nylon material and reside quiet when rolling at the floor.If the wheels are broken and just one rod remains, you will not know which mannequin will suit your chair. You can purchase rodless casters.Wheel diameter: 50mm/2 inchesWheel width: 38 mm/1.5 inchesHole diameter: 8 mm / 0.31 inchesHole depth: 26 mm/1.02 inchesInstallation height: 58mm/2.3 inchesCarrying capacity: 150 kg (5 pieces)Colour:BlackMaterial:plasticPackage Contents:5 x castersOnly the above kit content, different merchandise aren't included.Note: Light mirrored image and varied exhibits may cause the colour of the thing in the photo somewhat assorted from the real thing. The dimension allowed error is +/- 1-3cm.