The Pentel Tradio has always been one of my favorite pens from Pentel and I have most of the EnerGel ones, the fountain pen and the 0.05mm pencil which are on the left. Now they come out with a complete new line which is available on JetPens. These on the right are smaller then the originals and are made of hard plastic that feels like it could break. They all use the same EnerGel refills. To replace refills just unscrew the tip which is different from the originals which unscrewed at the mid point of the pen. They come in both black and white body colors. These are good pens but they do not have the feel of the originals. On the far right is a Pilot pencil and a pocket microscope all from JetPens. Add them all to your collection.