The internal shut off surround makes a nice neat finish to the inside of your vehicle, not a rough hole showing like other vents which to not have such surround, and sandwiches the roof skin between the upper and lower parts of the vent for increased stability.
eBay
100/125/150mm 304 Stainless Steel Wall Air Vent Extract Valve Grille Ducting Cover Air Vent Ventilator Air Ventilation Outlet
Aliexpress UK
Item Type: RV Fan. Mode: 1st gear is silent, 2nd gear is strong wind. 1 x Air Outlet. Top mounting typed, which is space‑saving, easy to install, no need complicated tools. 4 x Mounting Screws. If you are satisfied with our service, pls.
eBay
100/125/150mm 304 Stainless Steel Wall Air Vent Extract Valve Grille Ducting Cover Air Ventilation Outlet Air Vent Ventilator
Aliexpress UK
Strong wind but quiet operation, low noise, dependable to use. Item Type: RV Fan. 1 x Air Outlet. Top mounting typed, which is space-saving, easy to install, no need complicated tools. 5 x Mounting Screws.
eBay
150mm 6 inch Ventilator Pipe PVC Aluminum Tube Air Ventilation Pipe Hose Flexible Air Conditioner Exhaust Duct Air System Vent
Aliexpress UK
Finger Straightener Splint Joint Pressing Device Aluminum Adjustable Spring F. Strong wind but quiet operation, low noise, dependable to use. Inlet (suction) Hose For High Pressure Washer 3 M High Pressure Pressure.
eBay
2/3M 4 inch 100mm Ventilator Pipe PVC Aluminum Tube Air Ventilation Pipe Hose Flexible Exhaust Duct Air System Vent Bathroom
Aliexpress UK
This vent is fitted to caravans for ventilation of the shower toilet area. Made from white plastic. Round Bathroom Vent Cover £32.99. AIR FLOW 2300 sq mm.
eBay
Universal CPAP Hose Ventilator Circuit Ventilator Accessories Ventilator Tube 1.8M
Aliexpress UK
Soffit & Cladding Boards. 50 x White Plastic 70mm Round Soffit Air Vents, UPVC Push Fit Eaves Disc Fascia. 25 x White Plastic 70mm Round Soffit Air Vents, UPVC Push Fit Eaves Disc Fascia. 8 x White Plastic 70mm Round Soffit Air Vents, UPVC Push Fit Eaves Disc Fascia.
eBay
CPAP Hose Ventilator Universal Hose Ventilator Accessories Anti-snoring Apnea Ventilator Tube 1.8m
Aliexpress UK
Item Type: RV Fan. Mode: 1st gear is silent, 2nd gear is strong wind. 1 x Air Outlet. Top mounting typed, which is space‑saving, easy to install, no need complicated tools. 4 x Mounting Screws. If you are satisfied with our service, pls.
eBay
S7 PRO Wall Mount Ventilator with H13 Hepa Filter Modern Air Exchanger
Aliexpress UK
Van roof vent made from durable plastic. This affordablelow profile van duct vent stands just 50mm tall, low enough to fit under most roof mounted carrying racks. The roof vent provides a steady air intake perfect for almost any application such as on a van, bus or caravan.
eBay
KCvents VT125 Heat Recovery Ventilator Room Ventilation Fresh Air Fan With Ceramic Hepa Filter Ventilation System Exhaust Fan
Aliexpress UK