1.material:PI/PEEK,or other plastic 2.color:black,white 3.type: ... properties 3. high creep resistance 4. low expansion coefficient 5. wear-resistance and self-lubrication 6. good thermal properties Why choose ... MC Nylon, UHMW-PE, PU, POM, PC, PSU, PTFE, PPS, PEEK, PSF, PPSU, PBT, PPO/PPE,TPE, UP, Wave-transparent materials ... inquiry, pls feel free to contact with me. Thanks. PEEK supporting ring/sleeve