Z profile is a common cold-formed steel with thickness of generally 1.6-3.0mm and cross-section height of between 120-350mm, which made of galvanized steel. It has the advantages of adjustable size and large compressive strength, our solar panel flat roof mounting kits galvanized steel z purlin products also have the advantages of durable, strong toughness of the coating and low cost. It is widely used in solar roof brackets, etc..