Consumer spur sprocket. Bearing is included.
Fits Homelite:
20
23
2500
27
2700
3300
3350
3800
3816
3850
4550
600D
700D
707D
7-19
770D
775D
C5
C51
C7
C71
C72
C9
C91
I3850B
I4150B
I4550B
PS33
Superzip
SXP1020
UT10901
UT10910
UT10926