Riester Replacement Non-Chill Ring for use with:

Riester Cardiophon Dual-Head Stethoscopes - Bell Side (RST-4131-01).

Riester Duplex-de-luxe Stainless Steel Stethoscopes - Bell Side (RST-4081-01).

Riester Duplex-de-luxe Baby Stethoscope - Membrane Side (RST-4042).

Riester Duplex Aluminum Stethoscopes - Bell Side (RST-4001-01).

Riester Duplex Baby Stethoscope - Membrane Side (RST-4041).

Riester Tristar Stethoscopes - Bell Side for Large and Membrane Side for Medium (RST-4091).