The Gelbo Flex Tester has been designed to determine the flex resistance of flexible barrier materials by applying repetitive strain. Pin hole formation is the criteria for failure and are determined by use of colored turpentine by allowing it to stain through the pin holes onto a white backing. While the sample is being subjected to repetitive twisting and compression cycles on the Gelbo Flex Tester, air is withdrawn from the testing chamber and the particles in the air stream are counted and classified on the particle counter. Application: Experiments of disposable or reuseable surgical bedsheet, surgical clothes and clean clothes for patients clinical staff and equipments. Features: Rate of cycles: 45 / min Standards: ASTM F392 conditioning levels A-E Stroke Distance: 80 or 155 mm Microprocessor & LCD display Twisting Angle: 400 deg or 440 deg Power: 110 or 230 Vac, 50 Hz, 700VA Home position for easy machine set-up Dimensions: 410(H) x 1,130(W) x 380(D) Model: GF-392 We