A Set Of Screw 1204 Flong Round Hole Nut And Straight Nut Sfu1204 100-1150mm Rolled Ball Screw Diameter 12mm Pitch Lead 4mm - Linear Guides - AliExpress
SFI Ball Screw - Zhejiang Kunyijia Machinery Manufacturing Co., Ltd., linear bearing, official website
GUWANJI Ball Screw SFU1204 250mm Ballscrew Antibacklash 1204 Ball Screws with Metal Ball Screw Nut for CNC Route Grinding Machine, Diameter 12mm Pitch 4mm (Length 250mm): Amazon.com: Industrial & Scientific