The product is only a set of 6, consisting of the two types of chest parts in image 1. Please refer to past listings and photo 4 for usage examples. This is for those who want multiple pieces at once. Please check the photos for the differences in the chest parts. Compatible Body Standards: 30ms Option Body 17 18 Cestier These are custom chest parts compatible with the above standards. Feel free to cut off the pins and modify them for other standards. They are made using a 3D printer and water-washable UV resin. You can paint, sand, and otherwise customize them as you like. Search terms: Bishoujo Plastic Model Himepla