Combination infant chestpiece precisely machined to exacting tolerances from surgical stainless steel for outstanding performance and rugged durability. 7/8″ diameter bell provides unsurpassed low frequency response. Ultra sensitive diaphragm (1 1/8″ diameter) for greater amplification and crisper high frequency transmission. Non-chill bell and diaphragm retaining rim for patient comfort. Reinforcing yoke molded into flexible 22″ PVC Y tubing. ADSOFT deluxe PVC eartips. Spare diaphragm and scope ID tag included. Weighs 5 oz. Overall length 31″. Lifetime quality performance guarantee. Latex free.