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

B10 (disambiguation) XB (disambiguation) 10 (disambiguation) B (disambiguation)