Used to maintain an unobstructed Oro-pharyngeal airway. Made from rigid, non-toxic medical grade PVC. Colour coded in-built bite blocks to avoid airway occlusion and biting of tongue. Sterile, Individually packed in peelable pouch pack. Available in 000, 00, 0, 1, 2, 3, 4 & 5 Sizes with diffrent color code.