Practical roll rings with plastic rollers and metal hooks for T-rails, ideal for attaching curtains and curtains with loop Easy to install: easy to insert the wheels into the rail, easy to hook the loops into the roll rings Multiple combination options, discreet roll rings, simple design Easy to put on and take off: easy to move the curtain thanks to the attached wheels Box contents: 20 x Gardinia roller rings, for curtain rails/T-rails, metal/plastic, silver/transparent