3oz (90ml) glass bottle of Noodler's Polar Blue fountain pen ink. The Polar ink series is lubricated and freeze-resistant.
Noodler's Ink Refills Polar Brown - Reformulated Bottled Ink – RefillFinder - Pen Refills, Ink and Filofax Diary Calendar Refill
Noodler's Ink Lubricating Bottled Ink - Eternal Polar Blue Noodler's Ink Lubricated Eternal Polar Blue Ink. Available in a economical 3oz plastic ink
Noodlers Ink Polar Blue 3oz Ink Bottle Refill
Noodler's Ink Fountain Pen Bottled Ink, 3-ounces, 20 Color Options
Noodler's Polar Black - 3oz Bottled Fountain Pen Ink - The Goulet
NOODLERS FOUNTAIN PEN INK 3 OZ BOTTLE BREVITY BLUE BLACK
Noodler's Fountain Pen Ink and Samples - The Goulet Pen Company
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Quick test of blacks has Noodler's Polar Black as darkest : r/fountainpens
Noodler's Turquoise Of The Mesas 3oz Bottled Ink