Rieker Inc. manufacturers Military Grade inclinometers using precision tube and ball construction. The 2145-05 offers the benefit of dual tubes in one: The lower tube provides a wide all-purpose ±45º measuring range in 5 degree tic marks, while the upper tube provides an added level of precision with ±5º range in 1 degree tic marks. . All our tubes are filled with a special damping fluid that controls the movement of the ball and will operate in wide MIL SPEC temperatures. Our industry leading ISO certified quality and control standards provides for the smoothest and most consistent roll among any inclinometer of this type worldwide. The housing is made of a rugged Military Grade 100% Polycarbonate, making these inclinometers extremely rugged and shatter-proof for all types of environments and weather conditions. The large, clear number and degree markings make it easy to get quick, accurate readings - clearly visible from 10-feet away. In ranges of ±5, 10, 26 and 45º there is a Rieker Inclinometer to fit most every application. Available in black or white.