Replacement calf drenching tube and tip for the Trusti Tuber for Flexi Tuber. Durable, flexible tube has calf size markers for safe positioning. Transparent for monitoring and easy cleaning. Special moulded tip ensures correct airway positioning. To replace tube: Pull the old tube off the bottle cap. Remove the black sleeve. Pull old tube out of mouthpiece. Slide new tube in. Slide stopper on. Push onto cap - use hot water to soften the end.