CHEK InclinometerThis product is currently out of stock and due back in 1216 weeks. Youre welcome to secure your item with a deposit to ensure allocation from the next shipment. Designed by Paul Chek, the CHEK Inclinometer is used to measure first rib angle, pelvic tilt, and general goniometry. First rib angle is important when diagnosing or preparing programs for such conditions as forward head posture, thoracic outlet syndrome, scalenus syndrome, tension headache,