Casters of the production materials are there?

Casters products now main can do of material has: polyurethane, and cast iron cast, and NBR type (NBR), and nitrile rubber, and natural rubber type, and Silicon Viton type, and neoprene type, and butyl rubber type, and silicone rubber (SILICOME), and ternary b c rubber type (EPDM), and Viton type (VITON), and hydrogen of nitrile (HNBR), poly ammonia fat rubber round, Oak plastic, PU rubber round, and PTFE rubber round (PTFE processing pieces), nylon gear, POM rubber tires, PEEK rubber, PA66 gear, POM rubber, plastics (such as high-strength properties of PPS, PEEK tube).