Tuff-tools line of calibrators is manufactured by mikrotek instruments, t140. The company is engaged in providing instruments and equipments. It is the distributor and manufacturer of test and measurement, calibration and high voltage testing. The tuff-tools line of calibrators is designed to give the technician laboratory grade accuracy. These instruments are rugged and easy to use. Tuff-tools line of calibrators is pressure calibrator and is available in several ranges starting from 200 inches h2 o, 30 psi, 100 psi, 300 and 3000 psi. The salient features of the tuff-tools line of calibrators: