Thomas Select Tube Holder Adult - Pack of 25Accommodates tube sizes 6. 5 mm (Inner Diameter) to 42 mm (Outer Diameter) Large mouthpiece surface area Accommodates patients with removed dentures or facial trauma Suction Port Large opening allow for view of patient's mouth and lip colour Easy access for suctioning and other oral care needs Wide Head Strap Hook and loop padded strap provides secure and comfortable fit; even when wet Pliable Bit Block Unique construction to prevent the patient from