Lightweight aluminium body with powder coat finish. 1 horizontal, 2 plumb vials. Shock absorbing end caps. Milled working faces for precise measurement. Beam structure makes it strong and durable. Rule scale for ease of marking out. Accuracy: 1.0mm/m Available in sizes: 300mm/12", 400mm/16", 600mm/24", 900mm/36", 1000mm/40", 1200mm/48"