Specification Brand : BEVDICNC BulletPoint : Cylinders BulletPoint1 : Anti-rust Coating Surface: Linear Guide Rail adpots blackening treatment on surface to prevent rusting in long-term use. BulletPoint2 : Upgrade 3D Printer: The MGN12 Linear Rail will upgrade your 3D printer,which can improve print quality and carrying capacity greatly. BulletPoint3 : Premium Material:The linear bearing is made of heavy-duty bearing steel,which is more durability, high stiffness stiffness,high accuracy,smooth running, low noise than others.Material: Metal. BulletPoint4 : Application: This linear motion rail widely use in Ender 3 series/CR10 series 3D printers, large-scale transmission equipments including industrial robots, cleaning equipment and supporting devices, etc. BulletPoint5 : Drop Proof Rubber:There are 2 black rubber stoppers on the ends of the linear sliding guideway in case the carriage falls off the rail. Color : As Shown ExternallyAssignedProductIdentifier : 7341551901372 ExternallyAssignedProductIdentifier1 : 730759653935 ExternallyAssignedProductIdentifier2 : 0730759653935 ItemName : BEVDICNC MGN12H Black Linear Guide Rail 300mm with MGN12H Bearing Steel Black Carriage Block,for Ender 3, Corexy, Tronxy 3D Printers Upgrades and CNC Machine ItemPackageDimensions_Height : 7 centimeters ItemPackageDimensions_Length : 34 centimeters ItemPackageDimensions_Width : 12 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : linear-motion-guides Manufacturer : BEVDICNC Material : Carbon Steel ModelName : UCHAOCHE ModelNumber : 16Y49Q37929I3S4 NumberOfBoxes : 1 NumberOfItems : 1 PackageLevel : unit PartNumber : 16Y49Q37929I3S4 ProductDescription : Material:Bearing Steel Type:Slide guide rail Slide Track:Linear guide rail Accuracy level:H Length(Optional):(Approx)300mm/11.811inch MGN12H:Basic dynamic load rating:380 C[kgf] Basic Static Load Rating:600C[kgf]