Our 625 2RS bearings are high-quality rubber-sealed bearings used for an array of purposes which include but are not limited to: Automation projects, 3D printers and projects requiring 5mm radial bearings. At 5mm x 16mm, these high-quality bearings are extensively used in our V-Wheel Kits, CNC machines and 3D printers. The 2 rubber seals ensure that dust and particulates are kept out of the bearing tracks ensuring a long service life. The 5mm bore allows for use with 5mm rods or M5 Screws as a shaft for use in custom applications. Specifications. RPM rating 5000-6000 Bore: 5mm Outer Diameter (OD): 16mm Width: 5mm Material: Chrome Steel Colour: Silver & Black Use these with our Solid V, Xtreme, and Dual V wheels. Technical Drawing: