&&This is a hand operated, replacement air release valve for the AeroBed travel inflatable mattress. This device is made of black plastic and consists of an "air valve" as well as an "air release opening", which is large to allow air to escape quickly. The air valve is used to inflate an air mattress using specific models of inflation pumps. To inflate the mattress, the valve cap is removed and a pump is inserted into the air valve. When the pump is inserted, it pushes the air valve open, allowing air to be pumped into the air chambers of the air mattress. When inflation is complete, the pump is disengaged, the air valve closes to prevent air from escaping and the valve cap is replaced. To deflate an air mattress, the air release opening is used to allow air to escape from the mattress quickly through the large opening.