1.Manufactured from aluminum with powder coated finish 2.Protective plastic end caps 3.Box Levels-3 Vial Manufactured from aluminum with powder coated finish.Protective plastic end caps.With 3 fixed, round shaped impact resistant, horizontal, vertcal and 45 degree angle vials.Size: 300mm/12''. 400mm/16'', 500mm/20'', 600mm/24'', 800mm/32'', 1000mm/40'',1200mm/48'', 1500mm/60'' Box Levels-3 Vial