The Harpenden Skinfold Caliper is a precision instrument designed for use in the performance of Skinfold thickness measurements (from which estimates of body fat are derived). Software included. - Dial Graduation: 0,20 mm - Measuring Range: 0 mm to 80 mm - Measuring Pressure: 10 gms/mm2 (constant over range) - Accuracy: 99.00% - Repeatability: 0,20 mm