The E-A-RLink 3A Insert Eartips in Yellow are disposable, single-use foam eartips built for use with 3M E-A-RTONE 3A and 5A Insert Earphones during audiometric testing. This 750-piece case is sized for high-volume clinics, dropping the cost to roughly $0.52 per tip versus $0.69 in the 100-pack — a practical way to keep a busy testing room stocked without frequent reorders. These Standard, Adult Size tips (1/2 inch height, 13.7mm diameter) are latex-free and made from the same 3M foam used in Classic Yellow and Beige earplugs, with the direct-coupling design improving noise attenuation, interaural attenuation, and test/re-test reliability over supra-aural earphones while supporting infection control through single-use disposal.