• Silicon • Viton • EPDM • Neoprene • Nitrile Rubber * Manufacturing from FDA approved silicone Rubber. (100% Pure silicone Transparent,semi transparent rubber) * Shore 70 +/-5 hardness or as per the customers requirements. * Tri-clamp gaskets are available with collar for better grip and also without collar. * Available in Red / Orange / White & Transparent Colours