Electro Mechanical Tubing (EMT) is used to protect wires within an electrical system. It is the most commonly used raceway because it can be concealed or surface mounted, it is low cost, light weight and doesn't require threading tools like rigid. The bending process, however, requires more skill than with rigid because EMT is prone to kink. It is also called "thin-wall" because the wall is much thinner than rigid conduit of the same nominal size. Available from Wheatland, Allied, LTV and others.