1、HIGH DURABILITY: RV water tank made of LLDPE material, resistant to shock, pressure, cold and heat, and can be used in the environment of ‑40‑80 degrees Celsius. 2、LEAK PROOF DESIGN: One piece molded construction without welding seams, with square shape for easy storage and transportation, ensures tank's sealing and prevents leakage. 3、CUSTOMIZABLE USE: Smooth and sealed surface allows for easy modification to fit your vehicle or use, giving you reliable and simple applications. 4、LARGE CAPACITY: Equipped with a 130mm diameter water inlet with a sealed lid, it allows for easy and swift water filling, storing up to 21 gallons of water for daily use. 5、VERSATILE APPLICATION: This fresh water holding tank is suitable for RVs, trailers, outdoor camping vehicles, boats, yachts for fresh water storage, ideal for outdoor enthusiasts.