Thousands of coherently aligned plastic fibers transfer high-quality images through ProVision's 18 in. watertight flexible shaft. Fitting into 1/2 in. dia holes, high-resolution lens provides clear image of objects 3/4 in. to 1 ft away from tip of scope. Lamp, 2.5 V, illuminates inspected area. Cable bends repeatedly to 8 in. radius without damage.