1.Perfect Size: 5" X 3.3".Each unit comes with individual package. 2.Comfortable Wear: This latex free mask has an adjustable flange for the nose and a strap to ensure a snug fit during use. 3.Supreme Quality:Medical grade PE material 4.Product List：Packing include 2 masks and 2 tubing. Non Rebreather Oxygen Mask: Oxygen Mask is composed of a mask, 7feet kink-resistant oxygen tube and oxygen bag, made of medical-grade material and is used for oxygen delivery for patients with difficulty breathing and hypoxia.