Grille single blade can be divided horizontally and heel are two, left and right or up and down flexibly rotated to control the air flow direction. Tieling single Grille. Single Grille return air can be made when the structure can be opened, and the filter used in conjunction. Tieling single Grille | Yanda air conditioning | single Grille material provided by the Wu County Yanda air-conditioning plant. Tieling single Grille | Yanda air conditioning | single Grille material is Wu County Yanda air-conditioning plant (www.wcydkt.com) (www.wcydkt.com) this year introduced a new upgrade, the above picture is only for reference, please call the contact phone book page or image on to obtain the latest information, contact: Wu Yusong.