High Quality:This One-way Exhaust Fan is made of durable plastic, weather proof and wear resistant. Dust proof and Silent:Dust cover design, effective dustproof,provide a fresh air environment. Easy to install:Equipped with accessories, it is easy to install at the side exhaust port. Widely Fit for cars, trucks, tents, RVs, sleeper cabs, SUVs, ATVs, delivery cars, etc. 100% Guarantee:Our products are inspected before shipment.If the product is damaged or can not be used, the customer can contact us, Once confirmation is our product problem, we will provide customers with satisfactory solutions. 12V Side Exhaust Port Air Fan One-Way Ventilation Fans Dust-proof Cooling Fan for Car RV Caravan Van Description: – Side Air Vent With Blower Fan – Made of durable plastic, weather proof and wear resistant. – Suitable for RV Camper Motorhome Trailer Boat Marine Caravan Yacht.etc. Specification: – Size: Approx 145*135*45mm – Cutting Hole: Approx 97*97mm – Wire Length: Approx 160mm Package Includes: 1 Piece Exhaust Fan Black One-way slient 3 Pieces Short Screws 8 Pieces Long Screws 2 Pieces Clips