In the fuselage, GLARE2A is applied to stringers, GLARE2B to butt straps, and GLARE3 and GLARE4B to the fuselage skins. Late in the A380 development process, the plane was found to be heavier than the original specifications, so Airbus replaced conventional aluminum with GLARE5 as a weight-saving measure for the leading edges of the horizontal stabilizer and the vertical stabilizer, though at great expense. The A380 GLARE fuselage skin panels have a minimum thickness of but can be much thicker, as some areas of the shells may need up to 30 layers of aluminum and 29 layers of glass fiber.