I had previously experienced various fortifications that even with really expensive art objects (I wanted to leave no stone unturned), had to be removed after a short time, so that the little screw from the "inside" could be tightened again. After another 2-3 weeks repeated this game. Perhaps you know that a cover which rotates away suddenly. One of my visitors had this "important" crushed body parts.
My son has the frantic search eventually noticed and explained that he already has over 10 years has a wonderful toilet seat and this was updated by the landlord after the renovation. Since a number (is still stamped, but they are not found on the Internet) and the name (this and a bit of deduction brought success) was stamped, I could go on a search and was able to find here.
I am very happy and recommend this toilet seat you. In addition, you can sit super comfortable by the curved glasses.
All this could only give a perfect score.