Certification: ISO9001:2000 Material:PU(NBR,FKM can be offered) Size/Color:Various Prevent dust, suggested ,etc SpecificationAbout our companyName: dust ringsSize/Color::VariousPrice:As customer's quality and specific requirements.Sliding speed1m/sOperating temperature-25~120°CWorking mediumMineral oil based hydraulic fluids, barely flammable hydraulic fluids,water,air and others.Material PU(NBR, ...