The Jacuzzi 2472-135 pillow is for new (2020 and later) J-300 series spas. 2020 and 2021 J-300 hot tubs take two different pillows. Most seats use the “normal” pillows sold on this page. One seat, typically the lounge seat, uses the HydroSoothe massage pillow. That pillow has water spouting out the bottom.