Hubbell Wiring Device-Kellems HBL3000 Series raceway fittings and accessories are designed for covering, protecting & mounting applications. They are made of steel for durability, abrasion resistance and light weight. Raceway covers are ideal for covering open enclosures & wiring while providing a cut out for connection points, receptacles & switches. Choose from a wide range of cover plates, along with corner fittings, end caps, elbows and wire clips.