1.OEM service,best/medium/common qualitycopy 2.certificate of origin 3.certificate of ISO9001:2000 4.low noise,quick delivery specification of SKF high quality cylindrical roller bearing 315800:Cylindrical roller bearings, single row Product information Tolerances , see also text Radial internal clearance, cylindrical bore , tapered bore, unsealed , see also text Recommended fits Shaft and ...