The disposable anesthesia breathing circuit tube mainly consists of an inflation port, a patient connection port, a Y-shaped piece, a threaded tube, a smooth end, an assembly end, and a gas storage bag. The threaded tube (non extendable) is made of medical grade polypropylene, and the gas storage bag is made of natural rubber. There are two types of circuit pipes based on whether they are equipped with storage airbags, Type I (with storage airbags) and Type 2 (without storage airbags). Gas storage bags are divided into different capacities: 0.5L, 1L, 1.5L, 2L, 3L, and 3.5L. The rated flow rate of the breathing circuit is 30L/min, and the pressure increment does not exceed 0.2 kPa. The product should be sterile