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Continue ShoppingRotring Isograph Pen is a technical drawing pen with 0.30 mm point size with chrome-plated thin tip that adds finesse to your work. With 0.30 mm point size, Rotring Isograph Pen is a uniquely designed technical drawing pen with chrome-plated thin tip that adds finesse to your work. It comes with refillable ink reservoir which is ideal for frequent drawers using bottle inks. Easy to use on any surface such as line board, tracing paper or vellum drawing paper. Wear-resistant and hard chrome-plated thin tip allows usage over long hours. Unique push-on sleeve gives easy access to the ink helix and fast cleaning.