Durometers; Microscopes; Concrete testing machines; Electronic ultrasonic test equipment, namely, ultrasonic flaw detectors, thickness testers and hardness testers, for non-medical use; Force measurement products, namely, digital force gauges, digital torque gauges and manual and motorized test stands used therewith sold as a unit with the gauges; Gas testing instruments; Hand-operated laboratory tools for manipulating laboratory samples; Instruments for measuring length; Optical inspection a...