The Cromar Pro GRP Universal External Corner Trim C1 is a high-quality roofing accessory designed to provide a clean and professional finish to GRP roofing systems. Constructed from glass reinforced plastic, this external corner trim ensures durability and weather resistance. It is easy to install, helping you achieve a neat and secure fit on any corner of your roof. The Cromar Pro GRP corner trim is a versatile product that can be used with multiple roofing materials, making it a great addition to your construction project.