ADC Platinum Adscope Lite 614 Lightweight Pediatric Stethoscope with Tunable AFD Technology, 30.5 inch Length, Pink Gasketed diaphragm alters its effective size and frequency response by simply changing pressure, bell-type low frequency response is achieved by simply holding the chestpiece in place with light pressure Firm pressure will produce diaphragm-type high frequency performance, sculpted chestpiece made from lightweight zinc alloy plated with an attractive satin finish, aluminum binaurals in satin finish Double leaf internal spring fixed at 15 degree angle for greater comfort, reinforced yoke molded into flexible 22" pvc "y" tubing Adsoft delux pvc eartips for the ultimate in wearing comfort and acoustic seal, sprare diaphragm included, scope id tag included The 614 pediatric chestpiece is sculpted with 1inch diameter diaphragm,diaphragm retaining rim color matched to tubing, inspected in the usa