brand new and high quality Features: Made of high-quality PVC material, soft, transparent, non-toxic, with no irritating odor, safe and comfortable. Designed to prevent carbon dioxide retention. Oxygen connector compatible with oxygen tubing and ventilator. Lightweight elastic strap for effective and comfortable use. Three-way oxygen tubing suitable for compressed air nebulizers, commonly used in hospitals, clinics, homes, and other settings for aerosol therapy. Specifications: Material: PVC Function: Negative pressure drainage (suction)接管 Allows two people to inhale oxygen simultaneously Intended use: For extraction and collection of body fluids Size: As shown in picture Color: Green/White (optional) Quantity: 1 set Note: No retail packaging. Please allow 0-1 cm measurement deviation due to manual measurement. Ensure you are comfortable with this before purchasing. Due to differences in monitor displays, the image may not accurately reflect the actual color of the item. Thank you. Package includes: 1 x Tube (other accessories shown in the picture are not included)