12mm Diameter Hardened Steel Linear Rod Custom cut for the ultimate ease of installation! Order is for 1pc; for more add additional qty. Feel free to visit our eBay store for other CNC, 3D printer, and machine hardware here. Select cut length in millimeters from the drop-down menu. Outside diameter precision ground to G6 tolerance : -6 to -17 um, micro-meters or -0.00024" to -0.00067".Cut length tolerance is +/- 2mm (we usually hold +/- 1mm).Chrome plate resists rust.C45 or GCr15 ,Rc 58-62 induction hardened bearing surface for low wear with LM12 series ball bearings.High strength 81,900psi UTS (Ultimate tensile strength).Perfect for 3D printers, CNC's, linear motion, and robotics.Orders are typically delivered in the continental US within 2-4 days of payment.More specific cut lengths are available, just order the closest size and note the specific length in the order comments, at the time of order. An Ebay message works as well, but must be sent within 15 minutes of the order, or we might cut the incorrect length. ShippingShipping for multiple items is calculated as one shipment only if the same shipping service is selected for every item, so you will not be overcharged for shipping multiple items. On checkout, eBay will split the single shipping charge, showing a shipping line on each items ordered. This is confusing, but shipping is only considered once as long as all items are checked out at the same time with the same shipping service.