ITEM NAME:1x Stainless Steel Air Vent Cover Panel Rectangle Louver Air Ventilation MEM Descriptio n Description: Vertical Rectangular Louvered Vent Cover Material: Marine Grade Stainless Steel Dimensions: Approx. 23 x 11.5 cm / 9 x 4.5 inch Mounting Hole Diameter: Approx. 4 mm/ 0.16 inch Suitable for related vents in boats, marine, yacht, caravans, home Package Includes: 1 Piece Boat Vent Cover Note: Due to the differences between different monitors, the picture may not reflect the actual color. There is 2-3% difference according to manual measurement, please check the size carefully before you buy the item. We offer you what you need! 1x Stainless Steel Air Vent Cover Panel Rectangle Louver Air Ventilation.Vertical Rectangular Louvered Vent Cover. 1 Piece Boat Vent Cover. Material: Marine Grade Stainless Steel. We'd like to settle any problem in a friendly manner. We want to make sure you are happy with our item.