Prism for bubble viewing Johnson 26X Automatic Level is a water and dust resistant level that features a wire hung, magnetically dampened compensator. It has a large, easy to use focusing knob, 360 degree horizontal circle, prism for bubble viewing, top mounted optical sight for quick reference, fine adjustment knobs, 1100 stadia for distance estimation Water and dust resistant for use in most weather conditions. GearPack Hard Protective Case 56L Johnson Level And Tool Certified Pre-Owned Johnson Level & Tool 40-6164 Magnetic Torpedo Laser Automatic Level Large, easy-to-use focusing knob and fine adjustment knobs on left and right sides with endless horizontal drive , 360° horizontal circle Johnson 40-6926 26X Automatic Level – Haus of Tools Water and dust resistant for use in most weather conditions Kit Includes: Level, case, manual.