Extruded aluminum posters hanging scroll bar, this open-type poster hanging bar is very easy to use and very convenient to change the poster. Super durable, and come with 2 hangling hooks and 2 end caps. Suitable for up to 48" posters. Specification: Length: 48" Material: Annodized Aluminium Alloy Method of use: 1. Open the poster holder; 2. Put poster into the holder; 3. Clamping down with pressure, close shut the holder. Then install end caps. Please reference pictures to position poster in correct position.