Continental Compact Wide Hermetic Plus 20 inch inner tube with either Presta, Dunlop or Schrader valve. 
Fits the following dimensions: 
50-406 → 62-406 (20 x 1.9 → 20 x 2.5 inches) 
In general valves can be separated into three different groups:
Presta valve: Sclaverand valve, Race valve, French valve
Dunlop valve: Wood, Bicycle or Dutch valve
Schrader valve: Standard, Car or Moto valve 
Symbolic picture: Image can deviate
Manufacturer item code:
0180042 (Schrader 40 mm)
0180045 (Dunlop 40 mm)
| Product name: | Continental Compact 20 Wide Hermetic Plus Tube | 
| Manufacturer: | Continental | 
| Item code: | CON526643 | 
| Activity: | Cycling | 
| Usage bikesport: | MTB | 
| Wheel size: | 20" (406mm) | 
| Tire width: | 1.90", 2.00", 2.10", 2.125", 2.25", 2.35", 2.40", 2.50" | 
| Valve type: | Dunlop (Wood), Schrader (Auto) | 
| Model year: | 2023 | 
| Collection: | Full year | 
| Weight: | 230g | 
| Manufacturer item code: | 0180042 | 0180045 | 
| Manufacturer page: | http://www.conti-fahrradreifen.de |