Special Features:

Designed to inspect internal components of a turbine type engine; 20 in. Assembled lg; bore size accommodated, 20 in. Max lg, 0.375 in. Min dia, max dia, a/a; w/removable head; 30 cycles, 12v lamps, lamp not rated for amp; w/carrying case; accessories and/or attachments, battery case with voltmeter 1, electrical cord - 1, lamp - 6, transformer - 1

Properties:

A viewing device used to visually inspect items such as cannon bores, internal combustion engine cylinder walls, propellant perforations of rocket motors or similar items, for defects of manufacture, corrosion, scars, erosion, etc., without the necessity of disassembling the item(s). It may or may not have extension tubes to cover the various ranges of inspection. The item is basically a straight-tube telescope using a mirror or prism.