Ⅰ. The FB900 fan mount box is suitable for mounting on vaulted ceilings. This outdoor ceiling fan mount box can support the installation of ceiling fans weighing up to 70 pounds and light fixtures weighing up to 200 pounds. Ⅱ. The ceiling fan mount box is made of materials with surface texture and can be painted. You can also paint the light fixture the color you want to match the color of the fan and light fixture, or keep it in its natural color. Ⅲ. It is suitable for cathedral ceilings with angles over 80 degrees, which is a way to install it on cathedral ceilings. Ⅳ. It can be installed on the ceiling of a home or open cathedral. It is easy to install on unfinished ceilings and requires a simple 2x4 frame to handle open ceilings. (2x4 frame not included) Attach the junction box to the bevel of the ceiling so that the short side of the junction box touches the bevel. Pass the wires through the junction box and then install the fan.