Fiber Optic McCoy Macintosh blades are made of stainless steel. Mccoy is a Macintosh blade with a tip which is adjustable through 70 controls with a lever during incubation to lift up the epiglottis. 3 mm and 4 mm Fiber optic pipe to ensure the best possible light intensity and durability. Both ends of the blades are protected for life, compatible with all fiber optic Handles. Blade No : MAC 2 ,155 mm