| Series | Product Image | Max power | Special Versions | Resistance Value | PDF | Supplier |
| RCE |   | 300W .. 1.800W | cemented | 0.2Ω .. 100kΩ |  |  |
| RNP |  | 560W .. 2.400W | Ribbon wound | 0.15Ω .. 3Ω |  |  |
| RMS |  | 650W .. 3.200W | Not-inductive, Multiple sections, Adjustable, Intermediate grip, Mica bar | 1.5Ω .. 90Ω |  |  |
| RDP |  | 600W .. 3.000W | Not-inductive, Multiple sections, Adjustable, Intermediate grip | 0.8Ω .. 150Ω |  |  |