Standard (F) storeroom system definitely belongs among the top sellers as the strength and security that it provides is often adequate enough. The Solid (FK) storeroom system has a heavy duty tubular design for both its doors and walls, which makes the system secure and stable. The Solid+ (FK+) system uses reinforced hinges, lock fittings, doors and walls. The sheet metal (FP) system supplied not with mesh but with solid walls, is developed for spaces with high safety and stability requirements but where what is in the storeroom does not need to be monitored.