Specification Brand : YWBL-WH BulletPoint1 : This linear rail and block are small in size and lightweight, especially suitable for small equipment. BulletPoint2 : Adopting 4-point design, it can bear load from every direction, and has good strength and high accuracy. BulletPoint3 : Designed with ball retainer, which allows interchangeability in the case of allowable precision. BulletPoint4 : Slide block is designed with mini retaining steel wire, and the steel ball will not fall off if taking the slide block down. BulletPoint5 : Widely used for automatic equipment, precision measuring equipment, and many other machines that need precision linear movement. ExternallyAssignedProductIdentifier1 : 747333444544 ExternallyAssignedProductIdentifier2 : 0747333444544 ItemName : MGN12 1000mm Linear Rail with MGN12H Carriage Block for DIY 3D Printer and CNC Machine ItemPackageDimensions_Height : 100.33 centimeters ItemPackageDimensions_Length : 1.27 centimeters ItemPackageDimensions_Width : 3.81 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : linear-motion-guides Manufacturer : YWBL-WH Material : Bearing steel ModelNumber : FSK30JE10012BC0802US-T01 NumberOfItems : 1 PackageLevel : unit PartNumber : YWBL-WHk4i65dvb8z ProductDescription : Specification: Model: MGN12H (extended) Type: Slide rail Slide Track: Linear rail Length: 1000mm / 39.4in Width: 27mm / 1.06 in Material: Bearing steel Block Fixation Method: Locked Weight: 719g / 25.4oz (approx.)