OD of TT ID 6.5 mm	OD off TT ID 7.0 mm	OD of TT ID 7.5 mm	OD off TT ID 8.0 mm
Mallinckrodt	8.8	9.6	10.2	10.9
Mallinckrodt Reinforced	8.8	9.6	10.2	11.0
Intersurgical	8.7	9.3	10.0	10.7
Intersurgical reinforced	8.8	9.5	10.0	10.7
Parker	8.8	9.6	10.2	10.9
Parker Reinforced	9.0	9.6	10.2	10.8
Ruesch	8.7	9.3	10.0	10.7
Ruesch reinforced	9.0	9.6	10.2	10.8
Portex	8.5	9.2	10	10.7
Portex reinforced	9.8	10.4	11.1	11.9
Unomedical	8.7	9.3	10.0	10.7
Unomedical reinforced	8.9	9.7	10.3	10.8
Microcuff	8.7	9.3	10.2	10.8

ID = internal diameter; OD = outer diameter; TT = tracheal tubes