LR209NPPU Track Roller Bearing 45x90x19mmLR209NPPU Track Roller Bearing Single Row Sealed Ball Bearing 45mm x 90mm x 19mm This LR209NPPU Track Roller is a single row track roller bearing designed for guided linear motion systems and heavy duty support tracks. With rubber seals and a rugged outer profile, it's made to perform in demanding environments. Ideal for conveyors, cam drives, and automated motion systems. Sold as one bearing. Size: 45mm ID x 90mm OD x 19mm width Sealed to block out