It is a disposable, self-adhering charcoal filter that can be applied to the outside of the pouch.
Coloplast Ostomy Supplies
620509 - Coloplast Inc Filtrodor Pouch Filter
Filtrodor Pouch Filter - Coloplast
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Coloplast® filtrodor - Med-Plus Physician Supplies
COLOPLAST Pouch Filter Filtrodor #509 : Health & Household
0509 Coloplast Filtrodor Pouch at Rs 35/piece
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Pouch Filters (Filtrodor®) item# 0509 at Meridian Medical Supply
Filtrodor Pouch Filter - Coloplast