METRIC (IEC) B5 FLANGE KITS- Includes parts to convert a B3 rigid mount motor to B5 flange mounting. Product Specifications FRAME180 RPM RANGE1701-1800 BRANDLeeson MANUFACTURER PART #175890.60 APPLICATIONSMetric Mounted - Gear Reducers, Pumps, Machine Tools, Fans And Blowers, Material FLANGEB5