Item Type: Linear Bearing Slide Set_x000D_ Material: GCr15 No. 45 carbon steel_x000D_ Hardness: HRC622_x000D_ Accuracy: g6 h6_x000D_ Roughness: Not less than 0.8mm(Rmaximum)_x000D_ Hard Tape: 0.8mm-3mm_x000D_ Grade Length: 100mm-3010mm(6000mm is available)_x000D_ Roundness: No more than 3.0mm(Rmaximum)_x000D_ Straightness: 100mm not more than 5mm_x000D_ Application: Widely used in the installation of various machinery; Such As: Engraving machine, woodworking machinery, printing machinery, machinery, etc. 1EASY INSTALLATION: GCr15 No. 45 carbon steel shaft bracket with pre drilling for easy installation and no need for maintenance 2STABLE COMBINATION: The perfect combination of the main shaft bearing guide rail and GCr15 No. 45 carbon steel bracket stabilize the original guide rail 3ACCURATE INDUSTRIAL GRADE: Linear bearing slide set adopt industrial standard SBR block with high accuracy linear bearing inside 4WIDE 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 5DURABLE 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 2 x Metal Rod 4 x Bearing 6 x Accessories