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16mm Ball Screw assembly 1350mm long & 3 ball circuit sfu1610-3-1000 Inner Diameter - 39.688mm ✨ Double Shielded Chrome Steel16 mm Ball Screw assembly 1350mm length for DIY CNC 16mm Ball Screw assembly 1000mm length + SFU1610 3 ballnut SFU1610 BallScrew Length: 1350mm Precision: C7 Material: Steel Screw Pitch (lead): 10mm Diameter: 16mm Quality: High speed operation and durability