depends on the chassis,i.e for a 25" monitor it will say POLO 25
depends on the yoke resistance of the tubes as well
depends on the crt neck pinout
example-
POLO 1 28"
Lh 1.49mh
Lv 24.5mh
Rh 1.6 ohm=horizontal yoke resistance
Rv 11.0 ohm=vertical yoke resistance