This Space Station Core shows just how ambitious the Kerlington model rocket catalog can be sometimes.
If you can manage to build a rocket capable of getting this into orbit, it is air-tight enough to let a few Kerbals live in it for long periods of time.
It also features a hub with five docking ports, so you can expand your station.
|Mass||184.170 t (dry: 80.010 t, fuel: 104.160 t)|
|Ressources||ElectricCharge, MonoPropellant, LiquidFuel, Oxidizer|