Our risers will come in either 2" or 3" and are designed to be used with our MB-4, MB-5, and MB-6 meter boxes. Just because the grade has changed or you need this box to be slightly higher does not mean you have to dig up the whole meter box and have to re-install everything. With our new riser it will be as simple as removing the old lid and inserting the riser. You will be able to use the same lid back on our riser.