Specification Brand : SCHROFF BulletPoint1 : The linear slide rail shaft is made of high quality carbon steel, and the bearing block is made of aluminum alloy, sturdy and durable BulletPoint2 : Standardized processing, ideal for guide rail positioning BulletPoint3 : Industrial-grade standard SBR block with high precision BulletPoint4 : Aluminum alloy support rail with pre-drilled holes for ease of mounting BulletPoint5 : Perfect for your DIY CNC routers, mills, lathes ExternallyAssignedProductIdentifier : 6400660883281 ExternallyAssignedProductIdentifier1 : 0694951742449 ExternallyAssignedProductIdentifier2 : 694951742449 ItemName : 23130119, Heavy-Load Slide Rail 100kg ItemPackageDimensions_Height : 15.24 centimeters ItemPackageDimensions_Length : 2.54 centimeters ItemPackageDimensions_Width : 7.62 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : slide-rails Manufacturer : Schroff Material : Steel Material1 : Aluminum Material2 : Steel ModelNumber : 23130119 PartNumber : 23130119 ProductDescription : Descriptions: The Linear Slide Rail Shaft Is Made Of High Quality Carbon Steel, And The Bearing Block Is Made Of Aluminum Alloy, Sturdy And Durable. Perfect For Your Diy Cnc Routers, No More Unwanted Errors In Your Machining Work Mills, Lathes. &Nbsp; Features:The Linear Slide Rail Shaft Is Made Of High Quality Carbon Steel, And The Bearing Block Is Made Of Aluminum Alloy, Sturdy And Durable. IndustrialGrade Standard Sbr Block With High Precision. Standardized Processing, Ideal For Guide Rail Positioning. Aluminum Alloy Support Rail With PreDrilled Holes For Ease Of Mounting. Perfect For Your Diy Cnc Routers, Mills, Lathes. &Nbsp; Specifications: Material: High Carbon Steel, Aluminum Alloy Model: Sbr12 Color: Silver Rail Shaft Length: 200Mm/7.87Inch Rail Shaft Diameter: 30Mm/1.18Inch Bearing Block Size: 40*40*26Mm/1.57*1.57*1.02In Weight: 991G &Nbsp; Package Included: 2 X Linear Slide Rail Shaft 4 X Bearing Block&Nbsp; Note: Please Allow 1-3Mm Error Due To The Manual Measurement. Thanks For Your Understanding.