This package includes:
1 x boot
1 x VE2 valve
Steel offers significant advantages over aluminum cylinders due to steel’s much greater strength. This allows for thinner walls and smaller overall size for the same internal volume. Steel cylinders also have better buoyancy characteristics as aluminium tanks become positively buoyant as they empty and you must wear extra lead to counteract this whereas steel cylinders remain negatively buoyant throughout your dive.
The VE2 valve easily switches from yoke to DIN simply by removing a threaded insert.