Ships from hongkong. These rollers are made of plastic and metal material, you will never worry about blemishing your beautiful curtain. Multi-purpose, perfect for curtains, drapes, sheer, valances, shower curtains. Lightweight but heavy duty, easy sliding gliders. We have attached the size information in the sample image (unit of measure: millimeter). According to your original curtain track roller or curtain track, please select the right style. Note: small parts, please keep them away from children.