Because of the special design of the ADA restroom in our store, we need one with handle level at the right side. This one save me tons of time, and the shipping is super fast, meet our tight schedule for the installation. Bought the other whole two pieces from the local hardware store (the handle for that one is at the left side, just use its bowl). This tank fits the bowl perfectly. But be cautious, you have to make sure your select the right bowl, it's not compatible to all the toilet bowls, even for Kohler brand

I bought this thinking the toilet would work like my other Kohler toilets and save water. It turns out it is not compatible with my old Kohler toilet. When it flushes, it does not allow the toilet bowl to vacate any water without holding down the flush lever for at least 15 seconds. I guess that is what I get for trusting some of the reviews I read. My mistake but be warned.