Sunset Healthcare Oxygen Tubing, 25 Foot6-channel safety tubing is kink-freeClear, "no memory" tubing remains straight when uncoiledInside diameter of 4.8 mm
drive Oxygen TubingKink resistant 3-channel extension oxygen tubing, 25 FootCompatible with most oxygen tubing rigid, swivel, and Y connectors, as well as inline concentrator water traps