27 COMBI Modular Wall Storage Boxes 27 COMBI is a complete and versatile system of modular modular containers, perfectly integrated into the SYSTEM civil series, which is able to satisfy the installation needs of excellent protection of the residential, tertiary and industrial sectors. The 27 COMBI series is available in both IP40 and IP55 and IP65 waterproof versions, recommended for all outdoor applications subjected to harsh weather conditions.