? Length: 500mm The shaft is case hardened. If you use normal steel shafts, the bearings will cut them up in no time. So make sure what you buy is case hardened! Aluminum support rail with pre-drilled holes for ease of mounting Perfect for your DIY CNC routers, mills, lathes Suits X, Y, Z axis Please check out my other CNC items we do provide combined shipping! ? Packing List 2 pcs SBR40--500mm Linear Rail 2 pcs SBR40LUU Carriage ? ? ? ? ? ? Precautions before placing order 1. Before placing your order, please note that the quantity, length, size and price of the items you have selected are correct. In case of doubt, consultation is welcome. 2. Since we use meters as the unit for producing mechanical tools, in order to prevent unit errors, please use meters (mm) as the unit. 3. If you do not find a suitable item, we support customization. You can contact us and send us the custom length or size you need. 4. All product prices do not include tariffs. Payment Instructions 1. We support the payment method under partners. 2. If you place an order, please pay as soon as possible, if you change your mind, please send "request to cancel the transaction" via. We'll cancel for you. International logistics methods 1. By default, we set a standard way for logistics SpeedPAK . This setting is only for the general specified way. However, the SpeedPak Logistics method has restrictions on the length, weight and amount of goods, and not all goods can be used with the SpeedPak logistics method. We will choose the appropriate international logistics method according to the actual situation (FedEx, UPS or DHL) 2. If your order shows that the area cannot be mailed, please contact us. Our items can be shipped to any part of the world, but are listed as not shipped countries and regions due to the need for approval of shipping costs. 3. If you need items with a length of 3 meters or more, we can use sea transport as a logistics method to meet the longer-oriented goods. But shipping by sea takes longer. Shipping by sea uses end-of-the-line truck delivery at prepaid cost. Customers are not required to pay duties and other fees, but they must guarantee that they can unload their cargo from the truck on their own. Costs and customs duties 1. SpeedPak logistics mode shows tariff free. However, not all items are subject to this mode of logistics. 2. Tax rates are unstable due to changes in international trade. Currently, all goods shipped from China to the United States are subject to a certain percentage of tariffs, and we do not include tariffs in our prices. Tariffs are calculated on the basis of the declared price. We typically mark the reasonable declared price for our customers, reducing the amount of the tariff. ? Packaging and after sales 1. All cargo packaging is combined with cardboard and other protective materials to ensure the safety of the goods during transport. 2. If you have received the goods and have any problems with their use, you are welcome to contact us. We have a dedicated team to assist you.