1.fire rescue air-cushion 2.air column type 3.quickly to fill gass,more softer and short time for rescue The weight is light,2-4 person can remove it. It is quickly to fill gass,when person jumping from high place they fell softer. It is short time for rescue be two person.Size:5.5×5.5×2.5mrescuing height :≤16mm Air column type of fire rescue air-cushion