Guedel Airways are a critical item for any advanced trauma response to keep airways clear of obstruction when providing advanced first response treatment. Guedel Airways are available in a range of sizes which must be appropriately matched to the patient to ensure a correct fit. Colours help with ease of recognition of a suitable size. Each airway is individually packaged for best hygiene practice. Guedel Airway #3 is colour yellow and is 90mm in diameter.