U Groove Type Polyurethane Pulley bearing is the ball bearing which wrapped with one layer of Polyurethane, the R4.5 radius to fit the application of sliding pulley. According to requirements, it has single or double ball bearings inside.
Model meaning of PUUT, First PU is material polyurethane for short, U means U groove, T means twin bearings inside. PUUT means Polyurethane bearing in U groove type, twin ball bearings inside. PUU means Polyurethane bearing in U groove type, one ball bearing inside.OEM Service is acceptable.