*PLUMBERSSTOCK EXPERT* responded:
Hi, there! Thank you for your interest in our Mansfield SB100-BONE round toilet seat. Do you still know the make and model number of your Mansfield toilet? For us to determine if it is compatible or not, we need to know the model number of your toilet. You can refer to this specification sheet for more information about the toilet seat. Please remember that even if both the toilet and the toilet seat have the same dimensions, it won't mean that both are compatible. We will be awaiting your reply. Thank you and have a nice day!