Same 0.25 × 0.60 mm opening, three foil thicknessesMore geometric volume comes with lower area ratio. These are examples, not approved foil selections.Same 0.25 × 0.60 mm opening, three foil thicknesses80 µm foilArea ratio 1.103Volume 0.0120 mm³100 µm foilArea ratio 0.882Volume 0.0150 mm³150 µm foilArea ratio 0.588Volume 0.0225 mm³More geometric volume comes with lower area ratio. These are examples, not approved foil selections.