Package Included: 4040 Aluminum Extrusion *2 12mm Linear Rail *2 T8 Lead Screw *1, M5 screw *16, M5 nut *16, Specifications: Extended Workable Area: Extend your 3018 CNC Y-axis from 290 mm to 450 mm, get a 300 x 320 mm work surface ,easily convert your 3018 to a 3040. Cost-Effective: Great value for money to get your 3018 CNC machined and get a larger one. Simple Assembly: Our package includes a detailed installation manual, just disassemble the original Y-axis part and install the extension kit. The price does not include additional taxes, customs. Any duty to be paid will be the responsibility of the buyer.