Feature:
  1）Material:Aluminium alloy/Stainless steel/Galvanized sheet
  2）Blades can be aligned horizontally or vertically.
  3）Deflection is fixed at 45 relative to the air stream.
  4） OBD or fliter can be added optionally
  5）Natural anodized aluminum finish or powder coated

Functions:
primarily as return or exhaust grilles or registers that match the appearance of the supply outlets.