Striped profile, roll formed, extra small. This article is a variation of ALT1N; the difference is the high density polurethane foam (320 Kg/m³ controlled expansion). Its peculiarity is a very reduced rolling encumbrance, that especially favors the utilization of boxes of smaller sizes. Moreover, the high density polyurethane considerably strenghtens the profile insofar it ensures a safe warranty in case of violent hailstorms. The product requires special side plugs with screws.