1. tool free snap-in frame for quick graphic changes

2. the width of the aluminum frame can be 32mm or 25mm usually, also can be 20mm and 3040mm

3. round / mitred corner

4. the back board is plastic usually for 25mm and MDF for 32mm, also can be other materials

5. many sizes are available

6. packed in plastic foam and carton

aluminum snap frame mitred corner 25mm