Combination pediatric chestpiece precisely machined to exacting tolerances from surgical stainless steel for outstanding performance and rugged durability. Extra large bell (1 3/8″ diameter) for unsurpassed low frequency response. Ultra sensitive diaphragm (1 3/4″ 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 included. Weighs 5.25 oz. Overall length 30.5″. Lifetime quality performance guarantee. Latex free.