Feature: 1. EASY INSTALLATION: GCr15 No. 45 carbon steel shaft bracket with pre drilling for easy installation and no need for maintenance 2. STABLE COMBINATION: The perfect combination of the main shaft bearing guide rail and GCr15 No. 45 carbon steel bracket stabilize the original guide rail 3. ACCURATE INDUSTRIAL GRADE: Linear bearing slide set adopt industrial standard SBR block with high accuracy linear bearing inside 4. WIDE APPLICATION: linear ball bearing group is widely used in the installation of various machinery, such as engraving machine, woodworking machinery, printing machinery, machinery and so on 5. DURABLE STEEL: Linear motion bearing kit is made of GCr15 No. 45 carbon steel, chrome plated surface treatment, beautiful and rustproof, hardness up to HRC62, more durable Specification: Item Type: Linear Bearing Slide Set Material: GCr15 No. 45 carbon steel Hardness: HRC62±2 Accuracy: g6 h6 Roughness: Not less than 0.8mm(Rmaximum) Hard Tape: 0.8mm-3mm Grade Length: 100mm-3010mm(6000mm is available) Roundness: No more than 3.0mm(Rmaximum) Straightness: 100mm not more than 5mm Application: Widely used in the installation of various machinery; Such As: Engraving machine, woodworking machinery, printing machinery, machinery, etc. . Package List: 2 x Metal Rod4 x Bearing6 x Accessories