DIAL ADJUSTABLE CONTINUOUS HEADBAND - Specially formed to fit. A simple twist of the adjusting dial changes head size. Sealed-in mechanism is self-locking and trouble-free. Gives better balance and even more comfort. IT TILTS - Adjustable pivots make the OptiVISOR unique - and the most handy magnifier yet. It's up, out of the way of normal vision when not in use, and there at your fingertips when you need it for magnified pinpoint clarity back at the job. CONFORMING HEADBAND - Of electrically nonconductive ABS material. Designed to fit and locate the scope in a natural, comfortable position. Total weight just 4 oz. So light you hardly know it's there. GENUINE LEATHE Mfg: Optivisor SPECS: No. 2, 1½X at 20" (51.0cm); No. 3, 1¾X at 14" (35.6cm); No. 5, 2½X at 8" (20.3cm); No. 7, 2¾X at 6" (15.2cm); No. 10, 3½X at 4" (10.2cm).