H20=Long Life, Corrosion-Resistant Stainless Steel. T1X=Polyamide Retainer. B= DDU=(2RS1-SKF)=Rubber Seals At Each Side Of The Bearing. NS7=(Segment Lubrication., Code 4)=NS Hi Lube Grease. (NS7: Inside With Grease, Up Than 35%, Temperature Resistanc