From Amazon.com product description:
Lange skinfold calipers are trusted at fitness centers and by personal trainers and healthcare providers worldwide. Lange calipers come with compact and attractive hard case, plus an instruction book. SPECIFICATIONS: Accurate to 1.0 millimeter; The tips adjust automatically for parallel measurement; The scale is easy to read and measures up to 60 millimetersLow friction bearings on all critical pivot points; Spring-loaded levers provide a constant standard pressure of 10 grams per square millimeter. ACCESSORIES: 5-Step calibration block included to test calibration.
- Best-selling mid-range skinfold caliper for professionals.
- Time-tested; can last decades with proper care.
- Accurate to +/- 1.0 millimeter
- Includes 5 stop calibration block to test calibration at 10, 20, 30, 40, and 50mm to ensure you are receiving a calibrated item.