The 2020 Metanium features a never before seen Magnesium CoreSolid Body, providing professional and enthusiast anglers with the solid advantage of durability, rigidity and sensitivity while reducing weight. Plus, the MGL III spool, reduces spool inertia 17% over the previous generation while still utilizing SVS Infinity Braking for the ultimate in adjustability and distance for all ranges of lures. Completely redesigned by Shimano engineers to be the most advanced Metanium ever produced.
| Model | Gear Ratio | Bearings | Retrieve |
| METMGL150B | 6.2:1 | 10S A-RB + 1S A-RB | Right |
| METMGL150HGB | 7.1:1 | 10S A-RB + 1S A-RB | Right |
| METMGL150XGB | 8.1:1 | 10S A-RB + 1S A-RB |
Right |
| METMGL151B | 6.2:1 | 10S A-RB + 1S A-RB | Left |
| METMGL151HGB | 7.1:1 | 10S A-RB + 1S A-RB | Left |
| METMGL151XGB | 8.1:1 | 10S A-RB + 1S A-RB | Left |
