I'm finding this one. Looks of the same construction but not the one you have. ANNOY TOOLS 2060U Z-Axis Slide Module Screw Slide Table Linear Rail Guide, 60mm Stroke Stage Actuator kit for DIY CNC 3018 Plus Z Axis Router Controller https://smile.amazon.com/dp/B099W1RWH8/ref=cm_sw_r_apan_glt_fabc_9KRZGFQX1JJ994QMYTCQ