Special Features:

Designed to inspect internal combustion engine cylinder walls through spark plug ports; 19 in. Assembled lg, w/o extension tubes; bore size accommodated, 16 in. Max lg, 0.450 in. Min diameter , max dia, a/a; w/removable head; 55 degrees prism head; electrical operating data, ac, 110 to 120 v, 60 cycles, 12 v lamp, lamp not rated for amp; w/o explosion-proof illuminating system; w/carrying case; no accessories and/or attachments

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.