Greenhouses Polycarbonate Greenhouse Panels Connectors Upgrade your greenhouse or cold frame with our 4FT Polycarbonate H-Profile Connectors, designed for secure and seamless joining of 4mm to 6mm polycarbonate panels. Each connector is made from UV-resistant polycarbonate to ensure durability, clarity, and performance under tough outdoor conditions. At 4 feet in length, they offer better alignment and fewer joints, helping reduce heat loss and weather infiltration. Whether you're building a new greenhouse or replacing old, brittle connectors, this 10-pack provides the perfect solution for creating a stronger, more weatherproof structure. Ideal for DIY builders, gardening enthusiasts, and professional greenhouse installers.