Radical 68
Radical 68 or radical dipper meaning "dipper" is one of the 34 Kangxi radicals composed of 4 strokes.
In the Kangxi Dictionary, there are 32 characters to be found under this radical.
斗 is also the 96th indexing component in the Table of Indexing Chinese Character Components predominantly adopted by Simplified Chinese dictionaries published in mainland China.
市斗 shìdǒu, sometimes represented by 斗 dǒu alone, is also the symbol for a Chinese traditional measurement of dry volume equaling about 10 liters, which is ~18.16 pints, ~2.27 gallons, ~610.2 cubic inches, or ~0.3531 cubic feet.