Littmann Rainbow Edition Classic II S.E Paediatric StethoscopeUniquely designed for smaller frames with a 1 inch open bell on one side coupled with a traditional diaphragm on the other side. Designed, sized and acoustically perfected for children A seven rating on a scale of 1 10 for performance represents its acoustic quality. Excellent acoustic seal and comfortable fit with patented 3M Littmann snap tight soft sealing eartips. Durability is demonstrated by the fact that the headset can be reliably flexed one