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Amazon.com: 300mm Rolled Ball Screw SFU1605 CNC Parts Ballscrew Anti-Backlash with Locknut Without Side End Supports : Industrial & Scientific
SFU1204 Ball Screw Kit for Ender3/pro/v2/neo/v2 neo 3D Printer Z-axis Upgrade with Flexible Component Elastic Coupling and Corresponding CNC Machining Accessories from ChowThink - Newegg.com
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