1.we are manufacturer 2.material is SSiC 3.full ceramic bearing 4.Prompt delivery time 5.Competitive price SSiC:Usage: high precision,high speed,vacuum,fixed anode X-ray tube,high temp,low temp,electric insulation,high precision ballscrew set,valve balls for acid,alkali,salt,measure pumps,flowmeter. Characterisitic:resistance to strong acid,strong alkali,salt and gas of deleterious, especially ...