This listing provides a compact linear motion solution built around two MGN type rails and four corresponding blocks for precise, smooth movement in small to mid size projects. The kit is described as 2 rails with 4 blocks, designed for MGN15H systems and measuring 200 mm in length per rail (2X200mm). The listing also references related variants MGN12H and MGN9H. Key benefits Precise linear motion for small CNC machines, 3D printers, and automation projects Smooth travel with low resistance across each 200 mm rail length Readytoinstall kit with two rails and four blocks, simplifying assembly Compact footprint suitable for desktop and benchtop applications Flexible use with multiple MGN series options as listed (MGN15H, MGN12H, MGN9H) Key attributes Functionality: miniature linear guide rail system with carriage blocks for accurate, repeatable movement Compatibility: compatible with MGN15H, MGN12H, and MGN9H variants as indicated by the listing Size: two rails, each 200 mm long (2X200mm) Blocks: four carriage blocks included (4 blocks) Application focus: suitable for CNC, 3D printer components, and other precision linear motion needs Packaging: two rails and four blocks provided in the set Two to three use cases Use case 1: Upgrade the Xaxis on a compact desktop 3D printer to achieve smoother, more consistent travel and improved print quality Use case 2: Build or retrofit a small CNC engraving or milling machine with precise linear guidance for repeatable cuts and accurate tool positioning Use case 3: Create a tabletop automation slider or positioning stage for assembly, inspection, or test rigs where compact, reliable linear motion is required Notes The product is marketed as a kit including two rails and four blocks, with a 200 mm rail length per piece The model references MGN15H as the primary variant, with related MGN12H and MGN9H variants noted in the listing Material and detailed tolerances are not specified in the description; installation should follow standard mounting practices for MGN style rails and carriages This description reflects the branding and features described in the listing, presenting a clear, readerfriendly overview of what the kit includes, its intended uses, and how it can benefit smallscale motion projects.