Draper-Expert-2-Piece-Plumb-Site-Dual-View-Level-Kit-In-Carrying-Bag-Draper-Expert-44504-B-I-Expert-Quality-I-B-comprising-1800mm-I-Beam-Girder-Section-Level-with-front-viewing-Plumb-Site-174-Dual-View-153-vial-&-800mm-Box-Section-Level-Aluminium-with-electrostatically-powder-coated-&-baked-finish-with-polyester-acrylic-paint-Accuracy-1mm-per-1M-0-001-176-in-standard-position-I-Beam-Girder-Section-Level-&-0-5mm-per-1M-0-029-176-in-standard-position-Box-Sectio