Thanks! It’s 1/4” Baltic birch. I bought it pre-finished from a specialty wood supply spot in Orange County called Austin Hardwoods. It was a little bit more expensive buying it pre-finished, but worth my time savings. -just had to be a bit more careful measuring

All the other plywood (cabinet doors, fridge cabinet, shelves and countertops) was purchased there as well but is 3/4” Baltic birch - double sided pre finished everything except the counter.