This open-circuit breathing system has a flexible connector with a 0.5 litre bag and paediatric ALP valve. The hose is 1.6m long with a 10mm i.d. corregations. It has a 15mm connector which fits most machines and an extra 15mm ; 6.9mm converter if needed. Spare parts are not available for this unit as they are regarded as single-use items in human anaesthesia so it must be replaced completely if a part fails.