Practical curtain rings with rotating head and clips for U-rails, ideal for attaching curtains and curtain fabrics Easy to install: easy to insert the rollers into the rail, easy to attach the curtain or curtain fabric with the clips Multiple combination options: discreet roll rings with sturdy brackets for hanging curtains without loops Easy to put on and close: easy to move the curtain thanks to attached rollers, no damage to the curtain rod Box contents: 12 x Gardinia roller rings with clips, for U-runners, roll dimensions: approx. Diameter 10 mm x 12 mm, plastic, white