REX DD3 TYPE-A DIGITAL DUROMETER HARDNESS TESTER GAGE Search Made by The Rex Gage Company. This is a Digital Durometer Hardness Tester Gage in Excellent condition. Model # DD3 Rex Durometers are known World-Wide for their quality, dependability and accuracy. Except where noted, all gauges comply with ASTM D2240. The Durometer is the international standard for the hardness measurement of rubber, plastic and other non-metallic materials. The Rex DD-3 Digital Durometer is the successor to the popular Rex DD-1. With its impressive list of features, the DD-3 is truly state-of-the-art, and is the ideal instrument for lab use. Some of the new features are: a new, larger direct drive LCD display, RS232 data ports for computer compatibility, a locking feature to prevent accidental erasure of tolerances, automatic shutoff, low battery warning. Features & Specifications: Solid state circuitry with LCD display Response speed is immediate Holds reading until reset Dial rotates up to 270° Conforms to ASTM D-2240 and NIST Traceable Durometer Type: A Range: 0-50 Resolution: 0.1 Size: 2.25" x 6.125"H Includes custom made carrying case Comes as shown in pictures.