Durable and Sturdy: Side-operated adjustable fan made of 316 stainless steel. The rosette is polished and adjustable with a locking mechanism according to ventilation needs. Ideal for heating or ventilating a boat, motorhome, or caravan. Easy Installation: For optimal ventilation, this is the ideal choice. The stainless steel rosette is easy to install and also protects against flies and other insects. Dimensions: The round grille is easy to mount thanks to its 5 holes. Outer diameter: 125 mm/5 inches – 3.5 mm/0.14 inch holes – suitable for ventilation ducts up to 100 mm/3.94 inches – material thickness: 1 mm. Ideal Ventilation Accessory: For barbecue professionals, this fan is a great asset for ventilating all barbecues. Heat can be generated depending on the food. Even garages can be optimally ventilated with these rosettes. Wide application: The gill fans are rust-proof, salt water and acid resistant and ideal for barbecue barrels, fire barrels, smokers, smokers, boats, RVs, garden