For use with the Lightweight Plastic Testing Stethoscope (SKU 3412) or the Durable Steel Stethoscope (SKU 3413) when Custom or Canal Aids have an average size canal. Part B consists of tubing, male snap-in attachment, and female canal tip/earmold receptacle. Overall length is 12 inches. 

Stethoscope attachment 787B Part B attachment with standard sized bell tip. Sold individually.