1.SGS,for all machines 2.SR,EPDM,SBR,CR,NBR,FPM etc. 3.UV,FR,oil proof,shock proof etc. 4.ODM,OEM,make as your drawing SR:good resilience,ozone resistance, ageing resistance, low temprature and bending resistance,low compression deformation,perfect electrical performance.SBR: high tensile strengh,abrasion resistance,heat resistance,ozone resistance,acid resistance,alkali resistance,alkali ...