What type of metal is used in the Aqua Joe AJSGH50? The Aqua Joe AJSGH50 is made of SAE 304 Stainless Steel, a durable and lightweight alloy that is resistant to corrosion, temperature, and puncture. Related articles What is the recommended procedure for using my AJFJH50-58-RV hose for the first time? What advantages does the AJSGH50 hose using SAE 304 Stainless Steel?