Model: HT6510F Durometer Type F is an exclusive design for testing soft cellular materials. The large diameter presser foot and cylindrical indentor configuration allow measurement by direct application to the test specimen. SPECIFICATIONS Display: 4 digits, 10 mm LCD Range: 0~ 100 Resolution: 0.1 Presser foot: 80mm diameter Indenter: Extension 2.54mm 25.2mm Cylinder Spring force: 455gf Measurement deviation: d ± 1 Power supply: 4x1.5v AA ( UM-3) battery Operating condition: Temp. 0~ 50 Humidity