Borescope-Oslash-10-x-900mm-Sealey-VS819900-Suitable-for-internal-inspection-of-cylinder-bores-engine-components-&-other-machinery-industrial-applications-Flexible-shaft-can-be-bent-to-shape-to-fit-through-small-apertures-&-around-obstacles-Subject-illumination-is-provided-by-two-LEDs-which-are-controlled-by-a-three-position-switch-giving-low-output-full-output-&-off-LEDs-are-powered-by-4-x-AA-batteries-supplied-Adjustable-eyepiece-allows-user-to-tailor-optics-to-suit-their-vi