24", Aluminum Box Beam Level, 3 Vial, Extruded Aluminum Box Beam Profile With Yellow Powder Coat Finish, Ergo Shaped, Soft Cushioned Hand Holes With Screwed On Hand & Grips, Precision Machined Leveling Edges, Solid, Machined Acrylic Yellow Vials With Permanent Interior Vial Markings, Vials Won't Fade, Leak Or Crack, Surround View Reflects Ambient Light For Easy Read In Dimly Lit Work Environments. Shock Protecting End Caps, Frame Dimensions: 1" x 2-5/16".