Material: aluminum Colors: white, RAL 9010, we can also follow customer's requirements Size: 100 x 100, 150 x 200, 250 x 300, 350 x 400 and so on You can choose the size according your requirements Features: The frame can take-down from the blade It is easy to clean and take-down The angle of blade is 45 degree It can be used in in the outlet to return air
