8500 in CS.
Overview for Welch Allyn 52434-U-1 Universal KleenSpec Disposable Otoscope Specula for Diagnostic and MacroView Otoscopes - 4.25mm - 850/bg
Made of eco-friendly plastic, the economical and convenient Kleenspec Disposable Otoscope Specula is the perfect choice for the discerning physician. 
The Kleenspec Disposable Otoscope Specula are compatible with the Diagnostic Otoscope model: 25020 and MacroView™ Otoscopes models: 23920, 23810, 23814, 23820, 23824.
Customize your Kleenspec Disposable Specula: 
The specula are available in a choice of two sizes:
2.75mm
4.25mm