The Bain circuit has the same components as a Mapleson D, but is "coaxial", with the fresh gas flow tubing positioned within the expiratory limb. Fresh gas flow is similar to other non-rebreathing circuits (200ml/kg/minute).
One 1.6m (63") Circuit
One 2 Litre Breathing Bag
One automatic pressure-release Intersurgical Pop-Off valve