This kit with metal parts is for those who have bought the previous Geeetech Rostock mini G2 and want to upgrade it to G2 pro which is craft out of high-quality aluminum and laser cut acrylic plate, making it more stable and smooth when printing, improving the printing accuracy and speed to a higher level. 

This kit is a perfect substitutes for the printed parts used on your G2 printer, apart from the printed spider part and the carriage, you will also get 3 driving wheels for more smooth sliding of the belt. For detailed package list, please refer to the document.