Made of a soft and sticky biocompatible material these ear tips greatly improve the ease of obtaining and keeping a good seal allowing the tester to quickly move on to other tasks complete range makes it possible to accomodate all ear canal shapes and sizeslable in different sizes with different shapes (mushroom and flanged ear tips for infants) Sanibel ear tips are latex freeBEL ear tips were designed for use with acoustic immittance instruments and otoacoustic emission system.