NOTICEOne set includes: Ball Screw Nut*1+Ball Screw Shaft*1+BF12*1+Motor Base*1+Nut Set*1+Coupling*1+SBR40*2+SBR40UU*4Processing system defaults to standard processing. If you require replacement processing methods or processing based on drawings, please touch seller or electronic mail us at weareyoung0722@gmail.com.Please be told that transport outsized items may well encounter customs clearance issues or require the fee of tariffs, which might be the duty of the customer.Custom machining in keeping with drawings accepted! Left threaded screws accepted! Precision customization available! Bulk orders welcome! Please seek the advice of the vendor or electronic mail us at weareyoung0722@gmail.com for details.If you've got every other question, please be happy to touch me at any time :).Q: Do you support Q: Do you assist machining merchandise in response to customer drawings?A: Yes, we are able to machine products in response to visitor drawings. Customers can put up their drawings to our AliExpress customer service or electronic mail them to weareyoung0722@gmail.com. The machining cost depends on the specific drawings, and the customization era is sometimes within 10 days.Q: What is the precision of the product?A: The default precision of the product is C7. If you require a selected precision other than C7, please touch customer support or electronic mail us at weareyoung0722@gmail.com.If you've any other question, please feel free to contact me at any time :).