Tornado Cable Blower is designed to be safe, fast and effective, even on tough terrain. Move fiber optic cable of 0.23 to 1.25 in. (5.84-32 mm) diameter at speeds up to 300 ft./min. (90 m/min.) into pre-installed innerduct or direct-buried duct. Accommodates innerduct from .47 to 2.48 in. (12-63 mm).