1. material: EPDM, silicon rubber, CR, Composite material. 2. colour: can be selected or black. 3. size: can be customized. There are two ways to make this product:1) molded 2) cut from hoseTo guarantee the quality of the products, we have been awarded a number of certifications including the state CMA Health and Safety (Nontoxic) Standard Certification in 1997, the SGS USA FDA Standard ...