Material: Made of plastic for a firm hold, durable and reusable. Size: 1.7cm x 1.8cm, Weight: 2g Easy installation: Simply insert the plastic stoppers into the inner sleeve, secure them with a simple twist, and then tighten the screw. No drilling required: The curtain stoppers can be easily fixed by opening and closing. This means you don't have to drill, modify, or destroy the curtain rail. Wide application: Widely used for curtains, such as door curtains, shower curtains, and window curtains.