MDF Singularis I Stethoscope - Single Patient Use - That is why we have developed the world's first premium, single-patient, non-cross contaminant stethoscope. The affordable and high performance MDF Singularis I Stethoscope is unmatched by any infection control, disposable or biohazard stethoscope on the market. Our single-patient use disposable stethoscope is the best in the industry. It is now friendlier for the environment because it's pthalate free. Pack of 10 for $58.79