The 25-Pack Tregaskiss Style contact tips, compatible with 404-1 and 404-3 gas diffusers, are premium MIG welding tips crafted from high-grade copper alloy tubing for exceptional precision and durability. Featuring a consistent internal diameter with a tight tolerance of +/-0.003", these tips deliver reliable and accurate welding results. The thick-walled design acts as an efficient heat sink, enhancing heat dissipation to extend tip lifespan and maintain consistent performance. Their threaded construction ensures a seamless and secure fit on MIG guns, promoting optimal contact with gas diffusers. Rated for up to 400 amps, these versatile tips are suitable for a wide range of welding applications. Additionally, each tip is marked with wire diameter identifiers for quick and easy selection, streamlining the welding process and boosting productivity. Designed for Tregaskiss-style MIG guns, these contact tips combine durability, efficiency, and ease of use for superior welding outcomes.