Additional Info
Source: Flashpoint: Secrets Of The Enclave
Enclave Brass Three-Way Column SWTOR decoration, screenshots and information!
Hook: Floor Medium Narrow (Blue Rectangle): The Enclave Brass Three-Way Column decoration fits into a narrow blue medium rectangle floor hook.
Hook: Floor Medium (Blue Square): The Enclave Brass Three-Way Column decoration fits into a blue medium square floor hook.
Hook: Floor Large (Purple Square): The Enclave Brass Three-Way Column decoration fits into a large purple square floor hook.
Flashpoint decorations have a chance from dropping from a certain flashpoint. They are not a guaranteed drop, but have good chances of being looted from the final boss and a high chance from the bonus boss. Hardmode flashpoints have a higher chance of dropping a decoration than storymode flashpoints.
Approximately one decoration is dropped per hardmode flashpoint, and each flashpoint drops a different type of decoration. The Enclave Brass Three-Way Column decoration is dropped from the Flashpoint.
Source: Flashpoint: Secrets Of The Enclave