Holinger Anterior Commissure Laryngoscopes uses the Yankauer post-nasal speculum. The tube’s superior surface rises obliquely and flares laterally, while the proximal end dips obliquely. Elevating the tuberculum of the epiglottis expands the lumen and creates a broader work area. Available in Six different sizes Infant, Child, Adult & Long Adult, Adult #1 “Slotted”, Adult #2 “Slotted”. https://grey-medical.com/product/holinger-anterior-commissure-laryngoscopes.html