Our 50 count sleeves of disposable otoscope specula that work well with all R.A. Bock, WA, and Dr Mom LED 4th Generation and Professional model otoscopes. Will work with standard Welch Allyn otoscopes but *** WILL NOT work with the Welch Allyn MACROVIEW model***. These are very high quality and fit for the Dr Mom LED 4th Generation and Professional model otoscopes.