WA Macintosh 3 Fiber Optic Laryngoscope Blade Oxygen Accessories what can you hear underwater MSHQ 22030C what can you hear underwater anyway Power: 2 x AAA batteries(not included) Removable repolishable light pipes make these the longest lasting fiber optic laryngoscope blades in the world * Reduced handle and blade weight for improved balance and maneuverability facilitating even the most difficult intubations * Repairable allowing replacement of the deteriorating light payways for a fraction of the cost of a replacement blade * Single piece stainless steel blades ensure blade integrity (no soldered joints) * Overall length 126mm * Inside base to tip 101mm