玻璃厚度:5-6厘   Glass thickness:5-6mm
颜    色:灰、银   Color:Gray/Silver
玻璃开孔:φ12   Glass open-hole:φ12
滑    轮:φ20-28   Pulley:φ20-28
方    向:固定   Mode:Fixed
可做静音   Can be make mute