Product Review

FH3 allows those flashlights (mid size C type battery) their body diameter is from 29.5mm to 33mm (1.15-1.3 inches),
and their head diameter is larger than 40mm.

For:

MAGLITE:
ML100 series
ML25 series
ML50 series
2-4C Incandescent

Streamlight:
Polystinger series
polystinger led series
Stinger led series
stinger xt
stinger series
Twin Task 3C series

FENIX:
TK47
TK47UE
PD40R

PELICAN:
7060

LEDLENSER:
M7R
M7RX
P7
M7
MT14

Surefire:
R1