This Aristotle engraved philosophy quote pen is engraved with his famous inspirational quote, "Knowing yourself is the beginning of all wisdom." This collectible pen makes a suitable gift for philosophy nerds, teachers, history lovers, and creative people of all types. It weighs 30 grams and measures approximately 5.5 inches long. The replaceable ink cartridge offers an alternative to disposable ballpoint pens. This pen fits the standard G2 ballpoint pen refills, also known as Parker-type refills. The inspirational quote is suitable for commemorating occasions such as graduation, birthday, and Christmas.