R905-500 MaxBrite HIGH OUTPUT ( for over 4000 feet) Heelless 15 1/2" Chimney for MaxBrite 500 Lamps
R905-500 MaxBrite HIGH OUTPUT ( for over 4000 feet) Heelless 15 1/2" Chimney for MaxBrite 500 Lamps
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R905-500 Heelless 15 1/2" High Output Chimney for MaxBrite Oil / Kerosene Lamps . 
Recommended for altitudes over 4000 feet 
OR
brighter light at any altitude.


Older model lamps will use different High Output Chimneys 
See R905-2 ( being retired) or R905-500 (100006743) Heelless and R105 Lox-On

Other options for better light output are the Light Boosters see N108B or N108N for more information on Light Boosters.