"C" cell expansion ring for Maglite dropin.
Lumencraft brand D cell 2,000 lumen and 3,500 lumen dropin bulbs to be used with "C" size Maglites
Enables D cell 2,000 and 3,500 dropin bulbs to be used with "C" size maglites
Just slip this over the bottom of the bulb and install as with D cell.
This product will NOT work with the 800 lumen FireFly Upgrade.