T=Machined Laminated Phenolic Cage (Single Row Radial or A. C. Bearings). DUL=(DL-Ax. Int. Cl/Pr Segment)/(DGA-SKF)=Set Of 2 Universal Bearings, Light Preload. P4=Dimensional & Running Accuracy To ISO Tolerance Class 4 (More Accurate Than P5)-Abe