Circuit: Universal F Coaxial 15-80kg

Rebreathing Coaxial Circle System: is the highest resistance & volume circuit with Inspiratory tube 13mm ID INSIDE the expiratory tube 25mm ID. Has a single inspiratory connection manifold with an expiratory side arm. Size 25mm (1") ID x 1.5m (5') long corrugated tube & 2L bag. Drying is difficult - can get mould growth. High resistance so only use for small animals bigger than 15kg (30lb).