Profile: Tentel provides test equipment for making mechanical measurements such as tape tension, spindle height, Z-plane flatness, torque, and head tip protrusion. Our product line includes tentelometer, spindle height, dial torque, head protrusion and accessories. Our brands include Tentel™. Our spindle height gauge is used to eliminate the two most common causes of ruined video tapes - edge damage and cassette binding. They are the only diagnostic tools which can pinpoint mysterious tape eating elevator latch & spindle end play problems.