Notice:the size you select is complete length,drive lengtth =total length -110mmThe coupling within the overseas warehouse is 8*10mm(for Nema23), if you need other couplings, please place an order from China :) 2* Linear guides with green caps4* Blocks (HGH15CA / HGH20CA Random Color)4* Grease nipple1* SFU1605 Ball screw rod with nut1* BKBF12 assist seat1* DSG16H Nut seat1* Coupling (standard default XB D25L30-8*10mm)The coupling within the abroad warehouse is 8*10mm(for Nema23), in order for you other couplings, please place an order from China :) 2* Linear guides with inexperienced caps4* Blocks (HGW15CC / HGW20CC Random Color)4* Grease nipple1* SFU1605 Ball screw rod with nut1* BKBF12 support seat1* DSG16H Nut seat1* Coupling (standard default XB D25L30-8*10mm)The coupling in the abroad warehouse is 8*10mm, if you need other couplings, please place an order from China :) 1. Selection of high hardness supplies 2. G10 grade GCR15 steel ball 3. High speed and occasional noise 4. Super wear-resistant① Nut② Dust ring③ GCR15 Steel ball④ Circular reverser⑤ Waist metal inverter ① Block② Bolt cap③ Rail④ Bottom seal⑤ Ball⑥ Retainer⑦ Grease nipple⑧ End Seal⑨ End capRolling Circulation system: Block,Rail,End Cap and Retainer.Lubrication system:Grease Nipple and Pipong Joint.Dust Protection system:End seal, Bottom Seal,Bolt Cap, Double Seals and Scraper.slider installationstepper motormotor included seatslide stage1: What material are the handbook rails and sliders?Answer: Bearing Steel2: What are the benefits of steel sliders over regular sliders?Answer: The metal one is made of imported steel, which is anti-drop, wear-resistant and lasts longer and has low noise.3: is the distances of rail end and hole the same?Answer: The gap distance of the handbook rail is fixed, 60mm, the end distance is different, and the different finish distances are calculated consistent with the full length and the hole distance.4: Is the instruction manual rail clean to rust?Answer: It is not smooth to rust, we've greased the surface5: What must I do if the slider encounters a freeze?Answer: During transportation, the metallic ball in the slider will shift. According to the method in our video, it can be soft by means of tapping around.6: What coloration is the slider?Answer: The colour of the slider is random, we are able to use red&black first, when it runs out, we can use red&green, black, black&green, etc.1. Please maintain a reputable mood when searching :)2. Working hours:Our operating hours are 17:30-2:30 Western Time from Monday to Saturday (excluding Chinese holidays and particular circumstances). If the shopper service would not reply to the message in time, it may be busy, please be patient, we are able to reply you instantly when we see the message3. Overseas warehouses:We have many overseas warehouses. Currently, we have warehouses in Russia, Poland, Spain, the United States, Brazil, in addition German warehouses which are being prepared. We will proceed to set up new warehouses in the future.4. Order preparation: Our Chinese warehouse is in Lishui, and the freight forwarder's deal with is in Shanghai, Yiwu, Shenzhen, so it takes about 2-3 days for the equipment to be sent from our warehouse to the freight forwarder's warehouse. The tracking variety of the equipment will be updated the next day5. Attention to Russia: Customers from Russia, please word that there are two modes of transportation for parcels from China to Russia. 1. Using AliExpress's logistics method, the transportation time is set 20-40 days. When the parcel is delayed, please contact customer service. 2. Using a Russian freight forwarder, in this case, the tariff of the equipment to Russia will be borne by means of us, but there is a disadvantage that the kit logistics information cannot be accurately tracked, don't worry, we will maintain in touch, the present kit arrival time is about 2-3 week.6. Regarding the price:you can touch the shopper carrier for a quotation, and we are comfortable to offer discounts to friends. It must be famous that the freight of the freight forwarder has been changing, which leads to the actual price could also be costlier or cheaper than the worth within the link, hope you could possibly understand.cnc blocks linear rail cnc equipment ball screw bloques hgr20 guia linear package cnc