This set is a collection of simply designed 5mm connection joints, perfect for customizing HEXA GEAR and Gigantic Arms models. Expand customization possibilities of joints by combining these parts with other 5mm connection parts. *The parts are made of HIPS (High Impact Polystyrene) material in dark gray. Model Specifications: ■ Compatible with kits that feature 5mm connection joints as their standard such as those from HEXA GEAR and Gigantic Arms series. ■ The entire kit can be interchanged and combined freely, as all of the joints and points in the kit are 5mm. Included Items: ■ Double Joint Type ×4 ■ Simple Joint Type ×12 ■ Ball Joint Type ×6 (This item is a reproduction.)