Regardless of whether or not 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 could be used.Suitable for most workplace chair furniture, easy to install, the wheels are made of polyurethane and nylon materials and live quiet when rolling on the floor.If the wheels are damaged and just one rod remains, you will not know which model will fit 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: a hundred and fifty kg (5 pieces)Colour:BlackMaterial:plasticPackage Contents:5 x castersOnly the above kit content, different merchandise usually are not included.Note: Light reflection and various displays could cause the color of the object within the picture slightly assorted from the genuine thing. The size allowed error is +/- 1-3cm.