MATERIAL: These curtain rings and clips are made of solid metal, it has the characteristics of rust, corrosion resistance, and is not easy to deform. DESIGN SPECIAL OPENING: Smooth without burrs, this curtain ring with strong clip can be opened, so you can replace the curtain without removing the rod which is very convenient for you. Can slide the curtain easily. USAGE RANGE: Widely applied for heavy curtains or light curtains, good for bathroom, bedroom, hotel, restaurant, etc. Not only can be used for hanging curtains, but also can be used for hanging home decor. SIZE: Curtain rings Internal diameter is 38mm, suitable for 33mm curtain rods . (Please confirm the size before purchasing) QUALITY: Two colors (black, silver) with durable plating, Beautiful polished surface, very easy to slide on the curtain rod.