These are spare diaphragms (both large and small) for Sprague Rappaport type stethoscopes. Wear and tear is just a fact of life, so if you have a functioning Sprague Rappaport stethoscope and are in need of replacing just the plastic diaphragms, then this is perfect for you.
Product Dimensions:
Large diaphragm - 40mm x 2.5mm (raised rim, not thickness of the plastic itself)
Small diaphragm - 26mm x 2.5mm (raised rim)