Description: 9 Slot round boat louver vent Durable and reliable With 4 mounting holes Easy to install and use Suitable for related vents in boats, marine, yacht, caravans, home Material: 304 stainless steel Diameter: Approx. 12.7 cm/5 inch Screw Hole Diameter: Approx. 3 mm/0.12 inch Color: Silver Package Includes: 1 Piece Boat Louver Vent Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!