Hybrid Door Options with TM175, TM200 & TC200 Models Raynor's Flex/Dock Option Adders can be found on any TM175, TM200 ThermaSeal models and TC200 TriCore Doors. Designed to be ordered with new door models or retrofit and existing opening on applications where damage is frequent to the bottom or bottom two sections. Found in Raynor's WebConnect as Options within each valid corresponding door model: TM175, TM200 & TC200. Flex/Dock doors improve thermal efficiency while providing Impact resistance in high-traffic areas.