The 25-Pack Tweco Style contact tips are engineered for superior welding performance, these contact tips are crafted from high-grade copper alloy tubing, ensuring a consistent inside diameter with a precision tolerance of +/-0.003" for reliable and precise results every time. The thick-walled construction enhances heat dissipation, acting as an efficient heat sink to extend the tip's lifespan and maintain consistent welding performance. Featuring a threaded design, these tips offer a perfect fit on MIG guns, ensuring secure contact with gas diffusers and eliminating compatibility concerns. With a robust capacity of up to 400 amps, they are versatile enough to handle a wide range of welding applications. Additionally, each tip is thoughtfully marked with wire diameter indicators, simplifying the selection process and saving valuable time in the welding workflow. Compatible with 51 and 35-50 gas diffusers, these tips combine durability, precision, and ease of use for optimal welding efficiency.