Professional disposable foam ear tips designed for use with 3M EARTone Insert Earphones during audiometric hearing tests. These yellow foam tips (part number 420-2004) are standard/medium size and come in packs of 50. The 3A model designation indicates compatibility with 3M's audiometric testing equipment.

By directly coupling to the ear canal via these disposable foam eartips, EARTone Insert Earphones offer audiometric testing with exceptional reliability. The insert design dramatically reduces background noise, reduces the need for masking noise, reduces risk of disease transmission, increases test/retest reliability, increases patient comfort with easy insertion, eliminates ear canal collapse, increases interaural attenuation, and is lightweight and durable. These foam tips are designed to fit directly inside the ear canal rather than around the ears, producing important advantages that enhance test reliability and minimize problems frequently encountered with supra-aural type earphones.