Steeles.com highly recommends the 97200-MC Welch Allyn Diagnostic Set instead of the 97150-M Welch Allyn Diagnostic Set. While both sets include quality Welch Allyn components, the 97200-MC diagnostic set includes superior instruments at a lower price. The 97200-MC Welch Allyn Diagnostic Set is one of the most common diagnostic sets purchased by students and professionals. The 97150-M Welch Allyn Diagnostic Set includes the non-Coaxial 11710 Ophthalmoscope and the 23810 MacroView Otoscope that does not include the throat illuminator. Without the throat illuminator, the set is not compatible with nasal illuminator or transilluminator attachments.