Vertical rectangular blind ventilation cover Material: Marine Grade Stainless Steel Size: approx. 23 x 11.5 cm/9 x 4.5 inches Mounting hole diameter: approx. 4 mm/0.16 inch Applicable to relevant vents for ships, ships, yachts, caravans and homes Product description Description: -Vertical rectangular blind ventilation cover -Material: Marine grade stainless steel -Size: approx. 23 x 11.5 cm/9 x 4.5 inches -Mounting hole diameter: approx. 4 mm/0.16 inch -Suitable for related vents in ships, ships, yachts, caravans and homes Package includes: 1 piece of boat vent cover Notes: Due to the differences between different monitors, the picture may not reflect the actual colors. There is a 2-3% difference in manual measurement, please check the size carefully before buying.