Set contains 600mm, 1200mm and 1800mm high-end Vulcan professional box levels with strapped carry case. Features Two solid acrylic vertical vials with Dual-View vial feature. One magnified horizontal solid acrylic vial. Epoxy-locked vials and plastic ABS vial housings, Accuracy to 0.0005. (0.5mm/m) at level, and in all plumb working positions.Two finely milled surfaces with anti-stick coating. Ergonomic Air-cushioned, non-slip handles.