Plain Linear Bearing CFPJR13 13mm JIS, Round Flanged Center, Double Wide you can order the matching

you can order the matching 6mm wrench as part #6101227

Carriage Only - matching rail part number CR20 sold separately

while the flange allows stable bolt-down mounting

Self-Lubricating Bearing Liner: FrelonGOLD® is standard

Linear Guide Carriage of 20mm width and 60mm length

Plain Linear Bearing CFPJR13 13mm JIS, Round Flanged Center, Double Wide you can order the matchingJIS Double Plain Linear Bearing, 13mm ID, round center flange, precision running clearance. This Simplicity bearing has a self lubricating FrelonGOLD liner bonded directly to the bore of a sturdy anodized aluminum body, with no separate insert, for maintenance free, oil free sliding in harsh environments such as extreme heat, dirt, welding splatter, and vibration, where ball bearings often fail. Its double sized body equals two standard bearings back