We inherited this toilet seat when we moved to this house 10 years ago. It had a small "bleach" stain at the back and I have tried numerous cleaners over the years, to remove it. Recently I tried a new cream cleaner and the stain turned purple. Other than that it is an excellent, heavy duty, quality seat and lid (Bemis make). Everything required to fit it, (in the box of the one I bought to replace it). Free to be collected. .