| Normal Core | Silent Core | Diameter | Specification(D×HD×T×H×N) |
| U300N | U300S | 300 | 300×50/60×3.2×15/18/20×21 |
| U350N | U350S | 350 | 350×50/60×3.4×15/18/20×24 |
| U400N | U400S | 400 | 400×50/60×3.6×15/18/20×28 |
| U450N | U450S | 450 | 450×50/60×3.8×15/18/20×32 |
| U500N | U500S | 500 | 500×50/60×4.0×15/18/20×36 |
| U600N | U600S | 600 | 600×50/60×4.6×15/18/20×42 |
| U700N | U700S | 700 | 700×50/60×5.0×15/18/20×50 |
| U750N | U750S | 750 | 750×50/60×5.2×15/18/20×54 |
| U800N | U800S | 800 | 800×50/60×5.5×15/18/20×57 |