*PLUMBERSSTOCK EXPERT* responded:
Thank you for your question. Yes, this works for your toilet! According to Kohler, the K-3402-PB toilet does not have a seat that is specifically manufactured to be installed with it. It can use any round front toilet seat including this Kohler K-4639-0 white Cachet Q3 toilet seat with Quiet-Close Technology. The original seat that came with your Kohler K-3402-PB toilet is the Kohler K-4662-0. You may need the Kohler 84999 anchor kit to help remove the old seat and install the new one. Here's a video on how to use it. If you don't have the Kohler 84999 anchor kit yet, you can order this product by calling our Customer Service Department at 435-868-4020 or by sending an email to email@example.com. If you wish to purchase this K-4639-0 round front toilet seat, simply click on Add to Cart and enter your zip code for shipping. Happy shopping at PlumbersStock.com!