I had an aluminum Express when living with my EX. It had a white gasket that seemed to wear out all the time. We both used it daily and we would replace it 2 or 3 times a year. When I moved out I bought a stainless steel Venus, it came with a semi-transparent gasket. I have not had to replace it the entire time I have owned it. Daily use for almost six years. Don't know what the difference is in materials is, I believe both state silicone gaskets.