GOOD MATERIALS - Our black metal curtain rings are made of high quality iron with a smooth, rounded surface and a beautiful metallic sheen. The overall thickness is hard-wearing and has a long life span. VALUE PACK - You get a total of 150 curtain rod rings, each with an inner diameter of 1.2 in / 30 mm, a thickness of 0.14 in / 3.5 mm and a hole diameter of 0.19 in / 5 mm. 150 white plastic hooks are included. Our curtain rings fit for less than 27 mm/ 1.1 inch curtain rods, please make sure the size befor you buy it. EASY TO USE - Our curtain rings and hooks are easy to install. After inserting the hooks and passing them through the curtain rod one by one, the curtain can be hung up and then are ready to slide. SMOOTH SLIDING - The 30mm curtain rings features smooth surface without burrs which ensures effortless slithering along the rod to avoid the ripping, tugging, and pulling of the curtains. Applications - The drapery curtain hooks are compact and durable. The classic black colour can well match different kinds of home styles and is suitable for use in homes, dormitories, offices, hotels, restaurant, etc.