1-Top Box Cover,for Roller Shutter 2-Material: Aluminum-alloy 3-Shape: 45 Degree or Square 4-Size: 137,165,180,205 ... ,250,300 Aluminum Box Cover1-Appearance: 45 degree,or square, with 2pcs design2-Fisnihing: multi-layer baked enamel,anti-scrach3 ... the very products or information you want. Aluminum Top Box Cover for Rolling Shutter