Alpha 7056/19 BK005 is a code that refers to a specific part from the Alpha range of Gliders produced by the aircraft manufacturer Airborne. This part is a black, carbon fiber and Mylar roding cover. It is used to cover the fuselage seams of the glider and prevent air leaks which can reduce the performance of the aircraft. The material is lightweight and strong, and is designed to last for many years without requiring replacement.