Item Descriptions: -The track curtain hooks are made of high quality plastie curtain rail gliders won’t stain your curtains due to rust compare to metal ones. -This white plastic curtain hook is very convenient to install and use. You only need to insert several hooks into the curtain track at one end, and hang the curtain at the other end, so that the curtain can slide smoothly on the track, which is convenient and fast. Specification: Head Diameter : 9mm Body Width: 9mm Neck :3.4mm length :17.3mm Material: nano-plastic Color: white Package:100x Curtain Hooks Plastic White How to Install ? – Firstly remove the track end. – Position the plastic curtain track gliders around 8 to 10 cm apart along the entire width of the curtain to ensure to your curtains hang neatly and prevent the top of the them sagging. – Insert gilders into into the track. – Hanger your curtains, be careful when using a ladder. Notes: 1. Please allow 1-2cm error due to manual measurement, please make sure you do not mind before you bid. 2. Please measure the size of your curtain rail track before purchasing.