For measuring the PIN HOLE resistance against air and moisture. The Particle Counting Chamber for use with the Gelbo Flex from non-woven materials in a 30 second time period of flexing. Using ISO 9073-10, FIBRETEC have designed the Gelbo Flex Tester with Particle Counter for measuring the linting of non-wovens in the dry state. This test can also be applied to other textile materials.