Welcome to econvenience1986^_^ Can't find right one ? contacting and sending us the list with quantity ,length and machine end 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 For 40mm slotted bearings Suits X, Y, Z axis No more unwanted errors in your machining work! All items located in China , but you will get it fast and packed well! Don't risk having it shipped from overseas! These rails are also available in diameters of 12mm,13mm, 16mm, 20mm, 25mm , 30mm,35mm,40mm,50mm Brand new! Please check out my other CNC items we do provide combined shipping! 2 pcs SBR40--1524mm Linear Rail 4 pcs SBR40UU ? ? ? ? Note 1.We have all diameters of SBR Series linear rails. 2. the length can be customized . 3.Please be kind to give us 3 to 4 days to handle the orders.We have many orders to deal with each day.We have to make sure each order packing well.? ? Payment 1. Payment service is the main collection method. Customers can pay through various channels. 2. Make sure that the order is accurate before payment. If you change your plan after payment, find the transaction in the purchase record and select " Request Cancel Transaction" from the options. Because of's update policy, sellers' cancellation transactions are recorded in the list of non-performing transactions, and only buyers send cancellation requests will not be recorded in non-performing transactions. International freight ? 1. All orders are shipped from China. 2. All orders are transported by appropriate and reasonable freight mode, and the freight time is generally about 5-14 days. Typically international commercial delivery -- TNT, UPS, FedEx, DHL, E-packet, and speedPak logistics. 3. Because there are regional differences in international freight transportation, some countries or regions are listed in our non-shipment list. But we can actually send it anywhere in the world. Buyers on the list only need to contact us to get postage and freight information in your area. 4.All the shipments will be traceable with the tracking number. FedEx ?https://www.fedex.com/en-hk/home.html DHL ?https://www.dhl.com/cn-en/home.html UPS ?https://www.ups.com/us/en/Home.page TNT ?https://www.tnt.com/express/en_sg/site/home.html ? ? Processing time 1. Usually, we will deliver the goods within 1-7 working days after receiving the order. Because ballscrew processing takes time, we will not set inventory of ballscrew and guide rail in theory, because most guests will ask to change the size, so most of them are produced, assembled and packaged now, Reducing secondary damage caused by placement or repackaging of goods. 2. We set a 10-day processing date to reduce freight restrictions from the platform. 3. usually shows a long delivery time, and most of our goods will be delivered about 5-9 days after our delivery. Our total time is about 6-16 days. Per-sales consultation ? Our company has a professional team to reply to your consultation. Welcome to consult, welcome to customize your own CNC. After-sales and feedback Our company attaches great importance to after-sales problems. If there are any questions, we also have a professional team to answer them for you. If you are satisfied with our products and services, your positive comments are the greatest encouragement and support for us. International cooperation 1. If you are a factory or manufacturer and need stable supply, you can contact us. We support bulk procurement and shipping to reduce international costs. 2. If you are a local CNC parts seller, we can also provide you with sources of goods. We support mixed batches, but your purchase volume needs to reach a quantity. Only in this way can we minimize the cost and maximize your profits.