GooEquip linear guide HGR20 300mm rail with 4PCS slider block + 1PCS SFU1605 350mm ball screw with ball nut, BF12/BK12 support, DSG16H, coupling for 3D printer CNC machine.

["HIGH QUALITY STEEL MATERIAL: Ball screw shafts are made of carbon steel, linear guides are made of GCr15 bearing steel with aluminum alloy housing. Surface chroming provides rust protection. The hardness can be as high as HRC62, more durable.","HIGH EFFICIENCY and HIGH PRECISION: The motor-driven guide rail achieves highly precise linear movement. Designed for high-precision linear movements with low friction coefficient.","EASY INSTALLATION: Steel linear guide rail with pre-drilled holes for easy assembly. Stainless steel linear rail for linear motion. Easy to install, maintenance-free.","WIDE APPLICATION: Grinding machine, milling machines, lathes, drilling machines and comprehensive processing machines, discharge manufacturing machine, drilling machine, line cutting machine, precision measuring instrument, woodworking machine, loader and shipping device.","300MM HGR20 LINEAR RAIL: This linear guide set includes 2 pieces of HGR20-300mm guide rails, 4 blocks, 1 piece of RM1605-350m ball screw shaft, 1 piece of ball nut, 1 piece of BF12/BK 12 side, 1 piece of DSG16H nut housing, and 1 piece of coupling."]