The Miller MigMatic ® S400iP is a robust industrial MIG/MAG welding system designed for high‑demand fabrication, construction, rail, and shipbuilding environments. With full synergic Pulse and Double Pulse capability, a smooth 4‑roll MigMatic Feed 2.0 system, and multiprocess performance including MIG/MAG, Pulsed MIG, Flux‑Cored, Lift TIG, and MMA, it delivers outstanding arc stability and consistent results on a wide range of materials. Built with Miller’s proven Fan‑On‑Demand™ cooling and Wind Tunnel Technology™, the S400iP offers long‑term durability, improved efficiency, and cleaner internal components. A clearer display, Push/Pull compatibility, and upgrade options make it a powerful, flexible solution for modern industrial welding.