medicook tourniquet, 5-pack emergency professional adjustable elastic medical hemostatic blood first aid quick release torniquete with buckle medicook tourniquet made of strong elastic strap with a simple plastic lock. easy-to-use, release and unique one-button-push instant release. no pain when tightening the tourniquet snap-on safety closure,secure opening ergonomic casing ,sturdy snap-on clip materials abs plastic buckle + nylon cotton elastic webbing types plastic buckle tourniquet sizes 2.5*45cm, colors red, green, blue, yellow, pink the elastic ratio of belt: 1:1.5-1:2.0 recovery of elastic belt: 90% min. vertical pull strength: 50n min. expiry :2 year in common temperature convenient and quick to use,injured persons can use it themselves tightening force can be adjusted soft and comfortable, can be used by single person suitable for medical draw blood and emergency bleeding controller do not suddenly need apply large force on it release the belt slowly and then flip open.