Aluminum snap frames are easy to work .Aluminum frame with 20mm width and 1mm thickness profiles, 0.5mm thickness PVC corver sheet and it is can resist ultraviolet radiation ,1.3mm thickness ps back board ,Surface oxidation process ,it is not easy scratches and have strong metal colour and lustre,cut without burr and neatly,corner's aperture is small and  we can do any coler and size  that you