bit confused on these stats

[Mooncatt]

hi folks,

its prolly a little late in the day but I have only just noticed this and was hoping someone can explain please?

in the image ive attached the identified ship states that it has 3.4 to 24.8 armour. but at the bottom right it says 1.9 to 13.6 armour. why are these values different??

also what does pen v/h 31/4.4" mean please?

[akd]

The one in the pop-up is effective thickness after quality modifier.  On the right actual thickness is shown followed by the modifier in parentheses.

[Mooncatt]

Thankyou mate