1000mm x 1000mm Feet CNC Router Ball Screws Kit 20mm Rails and BallScrews XYZ Travel 37" x 37" x 9" inch: Amazon.com: Industrial & Scientific
TBI DFI 3210 2000mm Ball Screw Milled ballscrew and end machined for high stability linear CNC diy kit|tbi ballscrew|ball screw linearfor cnc - AliExpress
600mm x 1000mm CNC Router Ball Screw Kit 20mm Rails and BallScrews XYZ Travel 37" x 21" x9" inch - Walmart.com