WM Barr DampRid Hanging Moisture Absorber, Lavender Vanilla Scent (Pack of 6)

What are the ingredients

I want them for our sailboat. How long does a bag last?

Does each of the 6 boxes contain three packs? I.e. Is there a total of 18 bags?

Is this Fresh Scent or Lavendar Vanilla scent? The title says Fresh Scent but the description says Lavendar Vanilla. Which one is correct?