Zenith shows these as 7-1/4”X 4”X 3/8” (Actual is a smidge over 7-1/8”)
You’ll need to do your own research, but my innerweb search showed these are compatible with:
Altec 1217 HP, DC 1217
Asplundh Timberwolf
Bandit Models 100, 150, 200, 250 *old style (These are 3/8” NOT ½”)
Morbark Eeger Beever 100, show contact info
D Cyclone, 16 Super Beever
Replaces Morbark Part Number 39233-151
Woodchuck HyRoller, WC 17, WC 19, DC1217HP
Replaces Woodchuck Part Number 100-R040203
ccw