Maxx Flex 3/4 ID x 1" OD x 50 ft HydroMaxx Flexible Non-Toxic, BPA Free Black Vinyl Tubing Very Flexible - ideal for working in confined areas. Permits installer to make smooth, tight turns. Saves time and labor, Shore A Hardness Resistant to Chemicals, Non-marking, non-conductive and silicone free Smooth Inside and Outside - Allows Unrestricted Flow Non-Toxic PVC Tubing Can be Steam Sterilized Manufactured to FDA and USDA Standards