Frameless Panel Structure Solar Brackets Accessories The connectors including the triangle connector,hoop,purlin connector,L connector,hook and so on. They are made by hot-dip galvanizing steel and can guarantee long service life. All the connector can be customized according to customer requirement. Product Feature: 1. Manufactured from high tensile galvanized steel 2. Pre-punched holes based on detail design. 3. We can make adjustment to meet your inquiries as we can do. 4.