Description Are you looking for a professional, yet affordable U-groove guide wheel bearing replacement? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further! Our U-groove guide wheel bearing replacement must meet your needs. It is one of the best choices for you. Features -Color: Blue -Material: PU, stainless steel Outer diameter: 40mm Width: 13mm Protract: 1mm Thread length 10mm Thread diameter 8mm - With screw and plastic coated surface, it is easy to install. - Low noise, high rotation speed, it has long service life. - Reduce friction, even rotating speed, good stability and not easy to get hot. - High precision and resistance to friction, can be used for a long time. - Suitable for automation accessories, money counters, medical equipment, high-end sliding doors, etc. With screw and plastic coated surface, it is easy to install Low noise, high rotation speed, it has long service life Reduce friction, even rotating speed, good stability and not easy to get hot High precision and resistance to friction, can be used for a long time Suitable for automation accessories, money counters, medical equipment, high-end sliding doors, etc