*Note: This is a return. We inspected the item; all components are intact, working, and seem to be new. 2Pcs Linear Guide Rail kit HGR25-500mm Linear Slide Rails with 4Pcs HGHCA25 HGH25 Linear Blocks Bearing + Dust Cover C6 + Socket Head Cap Screw for DIY CNC Routers Lathes Mills This linear rail set contains 2x HGR25 500 mm rail shafts and 4x HGH25CA blocks, 16x M6*16 mm flat head hex socket cap bolts,50x linear rail dust cover C6, 1x allen wrench Linear guides are made of carbon steel, and linear bearings are made of GCr15 bearing steel. Surface chrome plating treatment is beautiful, anti-rust, hardness can be as high as HRC62, and more durable Motor-driven guide rail achieves high precision linear motion. Designed to achieve high precision linear motion, low friction coefficient Stainless steel linear optical axis guide bearings, steel support rail with pre-drilled holes for easy installation, no need for maintenance
