Ender 3/V2/Pro Y-axis Dual Linear Guide Upgrade kit 1) For the Ender-3, these adapters require the MGN12H rail, which requires a length of 300MM. 2)For the Ender-3 V2/PRO option, we will send a Y-axis limit block for. If your package does not contain a Y-axis limit block, please contact us to obtain this file 。 Suitable for: Ender-3/PRO/V2 Sliding plate mount*2 MGN12H linear guide (300mm) * 2 pieces M3X8 cup head * 26 pcs Piece M3 T-nut * 16 pieces M5X8 flat head * 6 pcs Features. 1、Double linear guide, more stable than single guide version and roller motion system. 2. No loss in Z-axis height. 3, Use of as many original plates and parts as possible. 4, Quick installation and upgrade Please note: 1) For Ender-3 type machines, this kit is only applicable to the version of the Y-axis profile 4040 profile, and cannot be applied to the machine with the 2040 profile 2) For Ender-3V2 models, you will need to print an additional Y-axis limit block to complete the assembly, be sure to contact us for documentation or leave us an email when ordering. Ender-3/PRO/V2 X-axis face upwards linear guide upgrade kit Suitable for: Ender-3/PRO/V2 Extruded backplate mount * 1 MGN9H linear guide (315mm) * 1 M3X6 cup head * 12 M4X8 cup head * 8 M4 T-nut * 8M 5X8 flat head * 3 Features. 1, Guide rails face upwards and take up little space. 2, No loss of building dimensions. 3, Easy and quick installation. Ender-3S1/PRO Y-axis Dual Linear Guide Upgrade kit MGN9H Linear Guide (315mm) * 2 Guide rail support fixed block * 4 Hotbed guide connector*2M3X6 flat head * 10 M3X8 flat head * 10 M3*5 cup head*14 M3 T nut * 10 M5X8 Flat round head* 6 Features: 1, Dual linear rails,more stable than single rail version and wheel movement system. 2, No lose in Z axis height. 3, Use as many original plate and parts as possible. 3, Easy and quick installation.