From Kotobukiya. Kotobukiya hits us with a new Modeling Support Goods item in a mechanized beast style, the Mecha Supply 16 Customized Head C! You can create a custom feral robot head for your kit(s) with this additional head part. The neck comes with two types for hexagear and frame arms, and the joint is compatible with 5mm diameter ball joints and 3mm diameter shafts. Molded in two shades of gray.