This dense rubber T-Gasket is designed for solar arrays with top clamps and ideal for gaps from 15 mm / 5/8 inch up to 26 mm / 1 inch. Made from dense, UV-resistant EPDM rubber rated for up to 30 years, it fits solar module frames with a wider gap range for extra flexibility. This spool of 100 feet (30.5 meters) can cover an array of about 5kW.