Specification: 14.5*30cm, Material thickness: 4mm A small mirror that is great for checking your setup on the green Provides full view of stroke, including eyes, shoulders and putter face. utter face. Using the portable mirrors within golf practice when teeing off or for perfecting swing at home can immediately identify bad posture. The Portable Mirrors prevent time wasting and enable the training to move forward at a faster pace. Specification: 14.5*30cm, Material thickness: 4mm