● This neck joint is compatible with Dollfie Dream DDf3, DDSf3, and DDdyf3. ● It makes it easier to remove the head when changing outfits, which is convenient. Simply replace it with the existing joint, so installation is basically possible without modification. ● The product is the one in the first photo. The item in the photo is a sample, so please understand that there may be slight differences from the actual product. ● Some force is required during assembly. It puts a strain on the ball joint receiver of the chest frame, so there is a risk of damage. Also, once assembled, it is difficult to remove, so please be careful of breakage. ● Since this is a handmade product, there may be some rough parts. Also, we cannot be held responsible for damage caused by joint replacement, so please purchase with this in mind.