installation was easy. A handy feature that prevents the internal nuts from turning. The color matches the roof. The gland nuts are well sealed around the cables. The 3mm thick flange is too flexible, it flexes a little when tightening the bolts, so is unevenly pressed against the sealing tape. I would have preferred the flange to be stiffer or have 4 bolt holes instead of 3. This is a small note. I would use this part again if I were to install another solar system. I like it better than the one that came with my solar kit.