Corpus Quartet
| Model | Bell | Slide | Gooseneck / Valve | Tuning Slide | Leadpipe |
| R4F |
Nickel silver
|
Bronze |
Hagmann/ Heavy cap
|
Red brass
|
41B |
|
R4F
|
Nickel silver
|
Bronze
|
Hagmann/ Heavy cap
|
Red brass
|
41B |
|
R4F
|
Red brass | Nickel silver |
Rotax
|
Yellow brass
|
5 Bronze |
| R9 | Gold brass | Bronze dual bore |
Hagmann/ Heavy caps
|
Gold brass | 9 |