This Stainless steel Floating lid is suitable for all types of variable capacity tanks with opened tops. This type of floating lid seals the tank preventing the liquid inside to get in contact with air.
The floating lid is positioned on the liquid inside the tank and the gap is taken up by the inflatable seal when you start to pump it up.
This item is the lid only. You can purchase the other accessories for the lid separately.

The item is just a spare lid, the accessories like a hand pump, airlock, rob, seal, etc can be purchased separately.