ball-type submunitions are anti personnel bombletts. They are very small and scattered across an area where there is a known concentration of enemy personnel. There are four sizes of ball submunitions the m32 style being the smallest "golf ball size" followed by the most common size "baseball size" the blu63 and blu36 are two examples. The Blu61 is around a softball size submuntion.
Dispencers

GBU 2
SUU 24
SUU 30
SUU51
MGM 52
MK 5

FUZES
Bomblet M219 M219E1 M218 M224
BLU 26
x
x
BLU 26-T
x
BLU 36
x
BLU 36-T
x
BLU 59
x
BLU 63
x
BLU 63-T
x
BLU 63A
x
BLU 86
x
BLU 86-T
x
BLU 86A
x