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It uses different linear rails compared to the old version: the old version uses MGN12H L320mm rails
Y-axis Linear Rail Upgrade Kit: This kit replaces the dual metal wheels in the Y-axis direction with linear rails while keeping other components the same as the original machine
Z-axis Upgrade Kit Full Version Kit: Includes Z-axis upgrade guide rail kit (林邓 guide rail) and Diagonal Brace Kit
Creality Ender3 S1 Pro Upgrade Kit Style:New Y-axis upgrade guide rail kit (林邓 guide rail) si=122QXYRKF1HSntKyProduct features: 1. The installation base is made of aerospace grade aluminum alloy with CNC processing, good flatness and verticality, high dimensional accuracy, lightweight product, and reduced motor load. 2. The Y axis adopts a unique structure of double guide rails , which makes the Y axis more evenly and stably loaded. The linear guide rails and sliders are made of high carbon chromium bearing steel and use electroplating rust prevention