Eastman's Steel Flex stainless steel toilet water supply line is the standard in water supply lines for toilets. Its quality is determined by what you can't see. The supply line features a non-toxic plastic core, a multi-filament braided nylon reinforcement, a clear vinyl outer shell and a grade 304 stainless steel braided exterior that is designed to prevent kinking and crimping. This flexible supply line resists corrosion and is easy to install.