48" Brass Bound Wood Level, Laminated Number 1 Select American Hardwood Plies, No Old Growth Or Rain Forest Lumber, Each Sight Contains 2 Individually Calibrated, Yellow Curved Vials That Are Insert Molded & Protected With A Glass Lens, Angled Brass Bound Edges, Shock Protecting End Caps, Frame Dimensions: 1-3/16" x 2-1/16".