| Feature | Standard Model | Gret39 Top | | :--- | :--- | :--- | | | AISI 1045 Carbon Steel | AISI 4140 Alloy / Ceramic Hybrid | | Surface Finish | 1.6 µm Ra | 0.4 µm Ra (Mirror) | | Lifespan (Cycles) | 500k | 2.5M | | Warranty | 12 Months | 36 Months | | Noise Output | 55 dB | 39 dB |
Watch Prepswift videos for math basics and begin the 1-month or 2-month study plan available on the website. gret39 top