Okai DC Chiropractic Technique: Cervical Spine Edition ME54-1 Cervical Spine Technique Theory ME54-2 Lower Cervical Spine Adjustment ME54-3 Occipital Bone Adjustment - Series Name: JAHAN LAM ORIGINAL DVD SERIES - Contents: 3-disc set - Number of Discs: 3 - DVD Type: Original DVD Thank you for viewing. Although several years have passed since purchase, the disc surfaces are clean, and the operating condition is also problem-free.