The Element RV & Marine hoses are engineered to be used in a wide temperature range and handle pressure up to 300 psi. While specifically designed for freshwater supply, our RV and marine water hoses offer outstanding durability and great performance in a variety of related applications. Depending on your specific needs, you may choose between two length options - 25 and 50 feet. The inside diameter is 1/2". The octagonal aluminum female coupling on the water supply end of the hose is easy to connect to a water source, and it is also reinforced with patented Hose Armor to prevent kinks. Your safety is important to us, so our RV and Marine drinking water hoses are phthalate-free and lead-free and supply drinking water without any additional odor or taste. Take these hoses with you when you head out to your next destination and enjoy their reliability in any situation.