Description Miller AccuLock S Series .023 contact tips are suitable for your Miller MDX-250 or MDX-250 EZ-Select MIG gun. The S Series are specifically designed for greater durability to last longer in industrial applications than the standard MDX consumables. Product Features: Industrial-Grade Performance - AccuLock S Contact Tips offer increased copper to handle demands of industrial-duty welding applications. Optimized Wire-Feeding - Contact tip is aligned and centered with the liner lock when the diffuser is tightened creating a flawless wire-feed path. Reduces burnbacks, bird-nesting and erratic arc. Quick Replacement - Coarse thread speeds contact tip replacement. Tapered Connection - Tapers lock the contact tip to the diffuser and the diffuser to the neck for excellent electrical conductivity. Cooling Tail - Contact tip tail is cooled inside the diffuser by shielding gas. Fewer Parts, More Accuracy - Compatible with Miller MDX 250 MIG Guns and Bernard BTB MIG Guns. Reduces your consumables inventory and the potential for replacement errors. *Compatible with the MDX-250 MIG Guns Accessories