NOTICEOne set includes: SGR35 Rail*1 (BLACK)+SGR35 Block*1 (BLACK)Please be informed that shipping oversized goods could encounter customs clearance issues or require the fee of tariffs, which would be the duty of the customer.Custom machining in step with drawings accepted! Precision customization available! Bulk orders welcome! Please seek the advice of the seller or e-mail us at weareyoung0722@gmail.com for details.If you have another question, please be at liberty to touch me at any time :).Q: Do you assist machining merchandise in response to visitor drawings?A: Yes, we can machine products in line with customer drawings. Customers can put up their drawings to our AliExpress customer service or e mail them to weareyoung0722@gmail.com. The machining charge will depend on the explicit drawings, and the customization era is typically 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 aside from C7, please touch customer service or e-mail us at weareyoung0722@gmail.com.If you have any other question, please feel free to contact me at any time :).