Carbon Replacement Bag Fits 3 INCH, 2 INCH or 1.5 INCH OdorHogs

OdorHog Activated Carbon in Mesh Replacement Filter Bag, Fits 3-Inch, 2-Inch or 1.5-Inch OdorHog

OdorHog Vent Stack Pipe Filter 4 Sizes, Black ABS with Mushroom Cap, Removes Outdoor Septic and Sewer Odors (3.0-inch)

OdorHog Clamp On Vent Stack Pipe Filter 2", Black ABS with Mushroom Cap, Removes Outdoor Septic and Sewer Odor Problems (2.0-inch)