Sony - Vented Sleeve for CRE C20 12 Pair Set Extra Small Small Medium Large Bundle - Black

Sony CRES2VX Vented Sleeve for C20 OTC Hearing Aid with Balanced Sound Quality (XSmall, 3-Pair) Sony CRE-S2VS Vented Sleeve for C20 OTC Hearing Aid with Balanced Sound Quality (Small, 3-Pair) Sony CRE-S2VM Vented Sleeve for C20 OTC Hearing Aid with Balanced Sound Quality (Medium, 3-Pair) Sony CRE-S2VL Vented Sleeve for C20 OTC Hearing Aid with Balanced Sound Quality (Large, 3-Pair).