As modern fishing rods become lighter and lighter, it is more important than ever to have a light reel that balances the rod correctly. This is important for all types of fishing but is most noticeable when using light, sensitive tactics. To balance these ultra light rods Shimano have introduced the use of magnesium, one of the strongest and lightest metals available. In the past it was impossible to use magnesium in salt water, due to it’s weak corrosion resistance, but now Shimano have developed a new surface treatment that stops any kind of corrosion.The Technium MGS 4000 is beautiful in appearance with its fantastic cosmetics, but it is also an advanced, high performance fishing tool designed for the most extreme situations. Full S-System features deliver the latest state of the art in the industry.Strong cold forged spools with large line capacity make the Technium MGS suitable for many different situations in both fresh and salt water.