A battery door is available for the 3M Littmann Electronic Stethoscope Model 4000WS, Model 4100WS and Littmann Model 4000. A battery compartment screw is available for Littmann Electronic Stethoscope Model 3000. 

Product Features Include: 

• Replacing the battery door on 3M Littmann Electronic Stethoscope Model 4100WS, Model 4000WS and Littmann Model 4000
• Replacing the battery compartment screw for the Littmann Electronic Stethoscope Model 3000