The following RV fresh water tanks are made of a tough polyethylene and are in use by many of the most popular coaches on the market. All water tanks are blank (no fittings or holes). Simply provide us with a sketch, and fittings and monitor probes will be placed at no charge. If you don't see the model you need, give our customer service department a call and we'll help you find it, or try our online search tool to fine a water tank that fits your exact specifications. All water tanks are NON-Stock and NON-Returnable. Lead time is approximately 2 - 3 week plus shipping. SHIPPING AND HANDLING RATES ARE AN APPROXIMATION ONLY AND MAY VARY.