Features Long Service Life:Made of cr steel with high carbon content, this Y-axis linear rail features strong wear resistance, smooth movement, low noise, uniform force distribution and more robust. High Speed Printing - Y-axis linear rails with smooth motion and low-friction features reduce energy loss and mechanical wear for faster printing. HIGH PRECISION PRINTING - High rigidity and stability linear guides maintain superior accuracy during movement, reduce print vibrations and improve print quality. Modular design for easy modification: You can easily upgrade your equipment without firmware modifications or wiring. Start printing immediately. Applicable Models This 3D printer Y axis linear rail guide kit is suitable for Neptune 3 PLUS Y axes, for Neptune 4 Plus Y axes. Check if it fits better! 1. Long Service Life:Made of cr steel with high carbon content, this Y-axis linear rail features strong wear resistance, smooth movement, low noise, uniform force distribution and more robust. 2. High Speed Printing - Y-axis linear rails with smooth motion and low-friction features reduce energy loss and mechanical wear for faster printing. 3. HIGH PRECISION PRINTING - High rigidity and stability linear guides maintain superior accuracy during movement, reduce print vibrations and improve print quality. 4. Modular design for easy modification: You can easily upgrade your equipment without firmware modifications or wiring. Start printing immediately. 5. Applicable Models This 3D printer Y axis linear rail guide kit is suitable for Neptune 3 PLUS Y axes, for Neptune 4 Plus Y axes. Check for a better fit! Specification: Item Type: 3D Printer Y-Axis Linear Rail Material: High Carbon Cr Steel Applicable model: For Neptune 3 PLUS Y axles, for Neptune 4 Plus Y axles How to use: Take out the product for immediate use. Packing List: 2 x guide rails. 8 x Guide Rail Brackets 2 Packs x Screw Attachment 1 x accessory. > Package List 2 x Guide Rails 8 x Guide Rail Brackets 2 Packs x Screw Accessory 1 x Accessory