AF Andreae Accordian Filters w/ Poly Back 36/case
Choose between 20x20 and 20x25. 36 Filters per case.
Poly backed AF Filters increase efficency.
The Andreae HE Original Filter will bring a filtration efficiency near 100% while keeping the high loading capacity of the Andreae Original filter. The HE is made with 2 layers of heavy “kraft” paper, punched, pleated and glued together completed with a polyester layer on its back increasing its filtration efficiency