Sofaer FLEX modulsofa Flex 57-13-VH Flex 57-13-VH & 56-12-V + 53-SK FLEX 54-11 & 50-B & 58-11-H FLEX 59-11-V & 57-12-H Flex 56-12-V & 56-11-V Flex 56-12-V & 53-SK FLEX 56-11-V & 56-12-H Flex 52-12-V & 53-SK