The product is a block of 4 US 31 cent airmail postage stamps commemorating the 75th anniversary of the Wright Brothers' first flight. The stamps feature a colorful design with a multi-color pattern and bear the images of the famous aviators. These stamps are mint never hinged, making them ideal for collectors looking for pristine condition pieces. The block was issued in 1978 and is a valuable addition to any aviation stamp collection, showcasing an important event in American history.