... Easy Installation 3.High Accuracy 4.Warranty: 25 years Aluminum solar panel frame with precise dimension, good surface ,high quality ... Sandblast oxidated treatment Character: Easy assembly and firmly fasten the solar panel, distort-free, Normal spec: (1). 30*25mm ... solar modules of 160-220W, (3). 35*35mm suitable for solar modules of 80-180W. Customer size is available. Aluminium frames for solar pv ...