BihlerFLEX™ products are made of FlexaPure™ – a proprietary formula, free of rubber and latex, that withstands exposure to salt water, ozone, oil, diesel fuel and more. This exclusive compound delivers outstanding performance under a wide range of temperatures and environmental conditions. Made in America, our FlexaPure products are resistant to cracking, breaking, splitting or becoming brittle, and will perform with flawless reliability year after year.