Kapro 170-81-72 Samson Non-Magnetic I-Beam Level with Plumb Site, 72-Inch I-beam spirit level for determining horizontal and vertical plane as well as incline Injection-molded acrylic vials: one level, one plumb, and one 45 incline Level vial and dual-view plumb vial can be read from the side and the top Handgrip for portability and ease of use Aluminum body for light weight and corrosion resistance