Features: OOTDTY fresh and excessive quality. Quiet strong wind, extensively used. It is made of materials and can be used for a protracted for time. Installation is simpler. Four sizes on your choice, 6/8/10/12 inches. Specifications: Material: Plastic Size: 6 inch/8 inch/10 inch/12 inch Color: White Package Includes: 1x Fan Note: 1 allow 1-2cm errors due to guide measurement, just be sure you don't intellect before you order. 2 to the variation between assorted monitors, the picture won't replicate the actual color of the item.