SurgiVet Foal Nasal/Porcine Endotracheal tubes. Silicone. Reusable and autoclavable. Tubes up to 12mm have a standard 15mm airway adaptor fitting. A silicone funnel is supplied on the 14mm tube. Repair balloon cuffs and inflation lines are available separately. Radiopaque. Available in the following sizes: 7mm (FN7), 8mm (FN8), 9mm (FN9), 10mm (FN10), 11mm (FN11), 12mm (FN12) or 14mm (FN14).