Engineered for precision and durability, the Weldmark by Tweco® MIG contact tips are designed to enhance the performance of your 250, 300, and 400 amp MIG guns. Crafted from high-quality copper alloy, these standard threaded tips feature a thick-walled diffuser that effectively dissipates heat, ensuring optimal electrical conductivity and extending the life of the tip. Each contact tip is meticulously marked for easy identification, and with a simple twist, you can access a new wear point, significantly increasing the lifespan of the product. Suitable for solid MIG wire and compatible with various Weldmark® and WeldSkill® MIG gun series, these tips are essential for achieving quality welds while maintaining the integrity of your equipment.