... abrasion resistance etc.sizeAs your drawing or sampleUsageAuto,equipment,machine,industry,ship,computer etc.SampleFreeProductionDepend on the items ... make sure good quality rubber material for production3.SGS,ISO certificate,make the test at a regular time4.Over 138 ... as rubber mixing millings,plate vulcanization machine,spraying device,type press,cutting machine,air compressor etc.5.Over 200 ...