The Salter Micro Nasal Cannula provides superior comfort and oxygen delivery in a smaller, less visible cannula designed for active, low-flow oxygen users. The Micro Cannula’s clear nasal prongs and faceplate are gently curved, conforming naturally to your nostrils and upper lip. These Micro Cannulas are designed for liter flows up to 3LPM; and include a 7-Foot Crush Resistant Oxygen Supply Tube with standard connector.