Fowler's Portable Durometers are just right for testing the hardness of flexible materials such as rubber and plastics. These gages conform to shore scales. Manufactured in accordance with DIN, ASTM, ISO and JIS specifications. Includes reference test block, operating instructions and fitted case. 35° blunt taper Durometers are suitable for testing soft and natural rubber products, neoprene, polyesters, soft PVC, leather, thiokol, nitril rubbers, wax, felt and more.