Regardless of whether or not the wheel hub is threaded or circlip type, as lengthy because the plunger size is 23mm-26mm and the plunger diameter is 8mm, this rodless caster would be used.Suitable for most workplace chair furniture, easy to install, the wheels are made from polyurethane and nylon material and stay quiet when rolling on the floor.If the wheels are damaged and only one rod remains, you won't know which model will suit your chair. You can buy rodless casters.Wheel diameter: 50mm/2 inchesWheel width: 38 mm/1.5 inchesHole diameter: eight 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 package content, different products are usually not included.Note: Light mirrored image and diversified reveals could cause the color of the object within the photograph slightly assorted from the real thing. The size allowed error is +/- 1-3cm.