The Tweco® Classic No. 4 MIG Gun is a heavy-duty, air-cooled welding torch designed for demanding industrial applications. Rated at 400 amps with a 60% duty cycle using CO₂ shielding gas, it accommodates wire sizes from 0.035" to 0.045". The 20-foot cable provides extended reach, and the Miller®-style rear connector ensures compatibility with Miller wire feeders. Its ergonomic oval-shaped handle reduces operator fatigue, and the durable construction ensures longevity in tough environments.