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6.0 Nominal (Clean Up) Diameter, 6″ dia. x 0.25″ wall Type 304 stainless steel material, 32 Ra finish on roll face, Dynamically balanced at 2000 FPM or your specified web speed, Runout to bearing Cbores within 0.005″, Straightness across face within .0005″/ft. of length, Low-friction bearings installed for a 2″ diameter shaft,