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. SPECIAL OPENING DESIGN: 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. RANGE USE: Widely applied for heavy curtains or light curtains, good for bathroom, bedroom, hotel.such, the restaurant, etc.Not only can be used for hanging curtains, but also can be used for hanging interior decoration. SIZE: Curtain rings Internal diameter is 38mm, fits 33mm curtain rods.(Please confirm the size before purchasing). Black color.Feature: ---Brand new and high quality.---Smooth without burrs.---Not only can be used for hanging curtains, but also can be used for hanging interior decoration.---You can replace the curtain without removing the rod which is very convenient for you.