Skillbuildersä Bi Height Wedge 18 x 22 Height: 4 or 6 Toe Crests This instrument is a significant Style:Pair (Left & Right) This instrument is a significant advance in hand held otoscopy providing an improved view for enhanced learning and decision making * A nearly complete view of the tympanic membrane with approximately twice the field of view and 30% greater magnification than a traditional otoscope * Better clarity and definition of landmarks * The ability to adjust focus for variable ear canal length or farsighted eyes * Second height knob removes side to side play Position at a higher or lower height (use on side 1 or side 2) * Without the removable straps the deluxe wedge functions just like the standard Skillbuilders© wedge *