1.SGS,ISO,for different machines 2.SR,EPDM,SBR,CR,NBR,FPM etc. 3.UV,FR,oil proof, ... ,mineral oil,lubricant and other different environment2.materia:SR,NBR,EPDM,NR,SBR3.color:available in any color,according to customer ... 1987,over 20 years production experience2.Stable rubber material cooperation,make sure good quality rubber material for production3.SGS,ISO certificate,make the ...