1. Heavy duty reinforced aluminum profile to maintain accuracy in tough work conditions and none twistFeature:

2. Three solid acrylic shockproof vials

-one horizontal vial,one 45 degree vial

-one with plumb site dual view vial

-Unbreakable acrylic shockproof vials

-Ultrasonic welding of the vials

-Anti-static,UV resistant

3. The plumb site offers the conventional side view of the plumb vial.The unique front view,eliminating parallax error,increasing accuracy,reducing neck and eye strain,increasing vertical visibility,enhancing line of sight,and saving valuable work time on large vertical alignment jobs

4. Extra-strong rectangular profile Ribs on the profile for reinforcement and improved handling&maintain accuracy in tough work conditions

5. Permanent impact-resistant plastic end caps are used to protect the measuring surfaces

6. Accuracy:0.5mm/m(0.0005in/in=0.029° )