1.SGS,ISO,for different machines 2.SR,EPDM,SBR,CR,NBR,FPM etc. 3.UV,FR,oil proof,shock proof ... sizes available6.packing;standard packing(inner:poly bag outer:carton) or customerizedcertification:ISO9001 ,SGSwe are looking forware for your visit ... UV,FR,water/oil/abrasion resistance etc.sizeAs your drawing or sampleUsageAuto,equipment,machine,industry,ship,computer etc.SampleFreeProductionDepend on the ...