Pic Solution Insupen 4 mm Insulin Pen Needle 33G gives you a comfortable and practically painless injection thanks to Pic technology, including an exceptionally small outer diameter, thinner walls, triple sharpening and the lubricating treatment of the needles. The creation of the Thin Wall is another great feature: this wide internal diameter means the flow of insulin is faster, reducing the injection time overall. But the real secret is in the needle: with triple sharpening and a lubricating treatment to ensure easier surface penetration, smooth flow into the skin and an overall reduction in pain.