Hello, and thank you for viewing. This is the contents of the product set: SHIMANO Holiday Cool 26L SHUWA Cooler Box Protein Skimmer Wood Stone: 1 Air Stone: 1 ARI PUMP Battery Operated: 2 ARI PUMP Outlet Operated: 1 That's all. Except for the SHUWA cooler box, everything was purchased new about two years ago. This was created as a live bait cooler for horse mackerel, but it was mostly used to keep clams and spiny lobsters alive when purchased at the market, etc., for the trip home. Of course, it was used a few times for keeping horse mackerel alive. The ARI PUMP battery operated units have not been tested because I don't have any size D batteries. They were working until around October 2025, but please consider them as junk just in case. The ARI PUMP outlet operated unit has been tested and is working. I will package everything as shown in photos 16, 17, and 18. The packaging will be bubble wrap. Thank you.