Special Features:

Designed to inspect int combustion engine cylinder walls through the spark plug ports; 22.75 in. Assembled lg; bore size accommodated 16.5 max lg 0.75 in. Dia; 90 degree prism head; elec oper ac 115v 60 hz 24v lamp; w/carrying case; accessories and/or attachments 1 ea cont bx, conducting core, inlet cord, 3 lamp

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.