This type of spirit level is made of alloy and its length is 600mm with graduations. This type of spirit level is made of alloy and its length is 600mm with graduations. The five vials can be used to show different slope angles, including 0o,1.5o,3.5o,45o,90o, especially the angles 1.5:100and 3.5:100are adapted to construct slope ground.

Spirit Level With Five Vials