HydroMaxx 1/2 ID x 3/4 OD x 100 Feet Flexible PVC Black Vinyl Tubing. BPA Free and Non Toxic Authentic HydroMaxx Black Vinyl Tubing will always be labled with the MaxxFlex or HydroMaxx logo on the product. HydroMaxx Vinyl Tubing has an 80 Shore A hardness which makes it easy to use with insert fittings but also allows it to bend without kinking. Made in North America, BPA Free, Non Toxic and Made to FDA standards. Resistant to Chemicals. Smooth Inside and Outside - Allows Unrestricted Flow Non-marking, non-conductive and silicone free. Can be Steam Sterilized .