100%silicone material Resilient, stretchable factory price Made from FDA-sanctioned ingredientsAble to resist extreme temperature variation: -100°F to 500°F[U]Translucent natural color for visual contact with the flowResilient, stretchable, and resistant to compression setOdorless, tasteless, and inertGood electrical and weatherability properties — resists U.V., ozone, gases, and ...