【DURABLE AND ROBUST】 Side control - adjustable fan made of 316 stainless steel. The rosette is highly polished and can be adjusted with a locking mechanism according to ventilation needs. Perfectly suited for heating or ventilating a boat, mobile home or caravan. 【SIMPLE ASSEMBLY】 If you want to supply a room with fresh air as needed, you are making the right choice. The stainless steel rosette is easy to install and can also prevent flies or other insects from becoming a nuisance. 【Size】 The round fan grille is easy to assemble with its 4 drilling holes. Outer diameter 125 mm / 5 inches - drill holes 3.5 mm / 0.14 inches and fits ventilation pipes up to Ø 100 mm / 3.94 inches - material thickness 3 mm. 【Perfect ventilation accessory】 For grill professionals, the fan is a highlight to provide air to each grill. Depending on the food to be grilled, heat can be generated. Even garages can be optimally ventilated with these ventilation rosettes. 【Wide range of applications】The gill fans