10B or X-B may refer to:
- Oflag X-B, a World War II German POW camp for officers located near Nienburg am Weser
- Stalag X-B, a World War II German Prisoner-of-war camp located near Sandbostel
- A Mazda Wankel engine model
- Boron-10 (10B), an isotope of boron
See also edit
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