... Description of our rubber coupling with SUS301 band: 1) Material : natural rubber ,EPDM, NBR, or according to customer's requirement2) ... ) Canada standard6) Process : vulcanizationPictures of products as following: Flexible natural rubber reducer coupling with SUS301 band The hex screw with ... website.5,What is the material of the rubber?Mainly natural rubber6,What is the material of metal bands?It ...