The die-casted NX75-Z mod by Aspire features refined lines and high-level design accents throughout the design. The five button system is ultra-intuitive with one-button navigation between TC and Wattage mode. The NX75 series mods feature an all-new Customizable Firing Button Profiles (CFBP) function. CFBP allows for heat ramp-up (power curve) to be fine-tuned. This customization can be made with just a few button clicks. The NX75-Z also features Child Lock. The NX75-Z is made from die-casted Zinc-Alloy. Check out the NX75-S (Stainless Steel) and NX75-A (Aluminum) if you are looking for a high precision CNC mod.