Features: new and high quality Stainless steel ventilation grilles for flange insect protection. Installed in the outside wall, prevent the pest in the room through stainless steel net. Keep indoor and outdoor air circulation. Put this product into the round hole on the outside wall, for more solid, can be attached with glue or cement. Specification: Material: Stainless steel Diameter: 70mm, 80mm, 100mm, 120mm, 150mm, 160mm, 180mm, 200mm Color: Silver Quantity: 1 Pc Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x Air Vent Grille (without retail package)