Tech Line Chair Caster, Grey with Black Tread, Friction Ring - Item #600-100-GY-BL-FR-WB 4 in.
Product #: CS600B0100GYBL5 ST600FR10125ZN5
Color: Grey with Black Tread
Wheel Diameter: 4 in. (100mm)
Overall Height: 4 in. (100mm) Mounting Method: 11mm x 38mm Friction Ring Stem (fits most standard office chairs) Brake: Yes
Load Rating: 175 lbs. per caster