Unistrut Internal Channel Couplers 254mm - 41x21 Pre-Galvanised (P1219). Pre-galvanized steel is zinc-coated by a hot-dip process. It is a proven performer for indoor and outdoor applications. For severe corrosion applications, Hot Dipped Galvanised is recommended. Unistrut offers quality products and services in the electrical & mechanical industry. Their range includes Cable Tray, Cable Ladder, Cable Basket, Channel, Brackets, ClAs, and Channel Accessories. With a 10-year guarantee, Unistrut provides a wide range of support products, ensuring quality, innovation, and total traceability from steel manufacturer to delivery. Specializing in building services since 1998, we offer expertly developed products like stainless steel channels, slotted channels, plain channels, back-to-back channels, and GRP channels for reliable support systems.