With the Brand name Mould King, you can trust the quality of this set and its durability for long-lasting playtime. Constructed of high quality ABS material and carbon fiber material combined with a one time precision casting process. It is designed in accordance with common standards and can be compatible with your existing name brand toys. All parts are easy to assemble. Mould King building block sets are for kids, teenagers, and adults who enjoy the amazing experience of building or collecting.