Final price reduction. Four sets of DANTOTSU S. Each set only has two screws and round pieces. Two of the four DANTOTSU have smaller round pieces, but they still attach properly. Please check the images. I bought these used and used them for a year connected to a thermostat. They provided warmth. These are not for individual sale, but I am also selling DANTOTSU S size individually, so please take a look. Please read my profile before purchasing.