Features: This Oxygen Connector Adapter connects oxygen tubing from any tank or concentrator to your CPAP or BiPAP machine. The Oxygen Enrichment Connector Adapter includes a capped O2 port that allows you to seal the connector when not in use, helping maintain your CPAP system’s full performance without removing the entire adapter. The connector has a 22mm ID connection on one end and a 22mm OD connection on the other, designed to fit standard CPAP tubing. This item is latex-free and made of durable plastic to resist breakage. Specifications: Material: Plastic Size: 5.1 x 2.2 cm Color: Transparent Quantity: 1 Piece Package Includes: 1 x Connector Adapter with Cap Note: - Please allow 1–3 mm error due to manual measurement. - Color may vary slightly due to screen display differences.