Hi, We Have these 2 NTN UC204D1 BEARINGS For The SHAFT for AIRCONDITIONG FAN FOR A BUIDING In ADELAIDE.When I was working for AIRCONDITIONG an Refrigeration.Business.In The 1970's.Here Are the Spec's.Shaft Size 20mm I/D,47 mm OUTSIDE DIAMETER,17mm Length.These have STEEL An PLASTIC For the Seal to keep The Grease In .These Will Fit The Following Housings Retainer Housing no P204,F264,FA202,FL204,PA264,C204,C204,FH204