This swivel caster is Made of Metal with heavy-duty construction,durable and solid enough.It is Easy to put on and have plenty of swivel motion, Easy and rolling.Add this 3 rolling casters to your favorite C-stand or stand for more mobility in the studio.Locking wheels give safety and security to your equipment. rolling wheels make moving stands a snap. rubber base is perfect for non- design.Colour:blackMaterial:MetalPackage Contents:3 x Swivel Caster WheelOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.