GPR77 from MBW, Inc. Created: June 19, 2007 MBW GPR77 400-lb. reversible plateProduces 7,775 lbs. of centrifugal force at 4,725 vpmAble to shift travel direction at constant speedProduces amplitude of .064 in.Travels up to 85 fpmHandles all types of granular soils Want to know more about this product? Click here to request more information about GPR77 from MBW, Inc. .