Overview Reviews Product Description Use the black diaphragm chamber & screw-in metal probe to detect mechanical sounds from bearings, engines, transmissions, etc. For air induced sounds, attach the vinyl hose to hollow tube and funnel assembly. The funnel amplifier will detect noises from vacuum leaks, exhaust leaks, air leaks and wind noise. For hard to reach locations, remove the funnel and use the hollow tube. Lisle Tools Catalog Product Videos Custom Field Harmonization code HTS #8205599080 Manufacturing country US Product Reviews Write a Review Write a Review × Lisle Stethoscope Combo Set 52750 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *