Our 2160-B mechanical boom angle inclinometer is a -30 to +90 degrees unit with 5 degree increments. The housing is made of rugged ballistic plastic, making these clinometers extremely tough for all types of environments and weather conditions. With operating temperature ranging from -45°C to 82°C the 2160-B is the perfect all-season boom-angle indicator. The large, clear number and degree markings make it easy to get quick, accurate readings. This is a black unit with white markings.