Dual-sided chest piece with small 3. 3Cm diaphragm is ideal for paediatric patients. Contains one floating diaphragm for the stethoscope chest piece. Contains a black rim for assembly of the diaphragm to the chest piece. Contains a grey rim for assembly of the diaphragm to the chest piece. Replacement of ear tips, and the floating diaphragm on classic ii paediatric stethoscopes.