100 pre-cut foam air filters for BT-2000 generation testing systems.  (Skinny rectangle)
Dimension: ~0.3 x 1.5 inches
Quantity: 50 pieces
Price includes shipping.

Note: Air filters should be kept clean such that they do not obstruct airflow.  Filters can be cleaned with compressed air or water, or replaced when necessary.
Raw material is McMaster-Carr PN 2195K51 – 30 pore per inch