Hand crank blower has strong structure, small size, light weight, large air flow, beautiful appearance Hand crank blower is not easy to damage, wear resistant and high temperature resistant This fan requires no electricity, convenient to operate, widely used for leisure barbecues, fire, small stoves, etc Air duct diameter: approx. 1.9 inches (47 mm) / 0.7 inches (1.85 No batteries or additional firewood required, Manufacturer: Syanjin