-Ceiling mount curtain track gliders, 10 pieces in 1 set; -Multi-purpose, perfect for curtains, drapes, sheer, valances, shower curtains; -Silent rolling runner, these hooks will make the least noise as you pull the curtains; -Lightweight but heavy duty, easy sliding gliders ; -With different size for choice; Specification: Material: ABS plastic Size1#-Glider width: 20mm/ 0.79inch Size2#-Glider width: 20mm/ 0.79inch Size3#-Glider width: 15mm/ 0.59inch Size4#-Glider width: 23mm/ 0.91inch Package Includes: 10 x Curtain Gliders (4 Pack) Note: Due to the manual measurement, there is a slight difference between the size from the above and the actual item. Because of the displaying and lighting effects, monitor settings,etc.there could be a little color difference acceptable, please kindly note. If you have any questions,please feel free to contact us in any minutes, we are glad to solve your problem. Enjoy your shopping !