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No. 140 Cal-Van
This sensitive instrument provides a fast and accurate method of locating troubles in engines and other moving parts before internal damage occurs Plastic ear plugs shut out outside noises; the stainless steel needle probes the suspected areas, and finds the spot where the abnormal noise is concentrated. Stainless steel headset connects to clear plastic tubing to transmit 100% of available sound. An aluminum chamber amplifies even the lowest sounds through a rubber mounted probe. A plastic handle protects from shock. Chrome plated. Threaded to screw on the end of the standard 6"Cal-van is quality american brand and made in USA.
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