Machida's Model FBA-4B-100 flexible borescope is designed specifically for the helicopter engine market. It features a working length of 100 cm, angulation of 120 degrees, and an outside diameter of 4 mm. The battery-operated borescope is perfect for quick inspections because there is no hassle of carrying heavy equipment. This borescope is ideal for those looking for quality equipment at a low cost. For more information call (800) 431-5420 or visit www.machidascope.com.