Specification Brand : ReliaBot BulletPoint1 : 500mm stainless steel MGN12 linear rail guide with MGN12H block BulletPoint2 : There are 2 rubber stoppers to keep the block on the rail BulletPoint3 : Threaded holes of the block: 4-M3*3.5; center distance of the holes: 20*20mm; it is suggested to use T nut M3 if you fix it to 20 series EU Al-profile BulletPoint4 : The material of the rail and block is stainless steel, compared with bearing steel, it can meet higher requirements. BulletPoint5 : Compared with bearing steel, maintenance times can be reduced. BulletPoint6 : Please note that minor debris may adhere to the inside of the film. Upon receipt, kindly perform a brief cleanup as necessary. Rest assured, this will not affect the performance of the product. Color : Green ExternallyAssignedProductIdentifier1 : 0791564737302 ExternallyAssignedProductIdentifier2 : 791564737302 IncludedComponents : 2020TG122cmx10 ItemName : ReliaBot 500mm Stainless Steel MGN12 Linear Motion Rail Guide with MGN12H Carriage Block for 3D Printer and CNC Machine ItemPackageDimensions_Height : 53.34 centimeters ItemPackageDimensions_Length : 5.08 centimeters ItemPackageDimensions_Width : 5.08 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : linear-motion-guides Manufacturer : ReliaBot Material : stainless_steel_440C ModelName : Ylwxzenith7zdtb40gan ModelNumber : Ylwxzenithgbdoxrwp1z NumberOfItems : 1 PackageLevel : unit PartNumber : RZ040-500 ProductDescription : Packing list: 1 * 500mm MGN12 linear rail, 1 * MGN12H carriage block(installed on the rail) ProductSiteLaunchDate : 2020-11-10T09:09:57.762Z Size : 500mm Style : Stainless steel rail + MGN12H SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnspscCode : 26111500