You are buyong a used filter.

Healthway Replacement Carbon-Zeolite 7-Stage Pre-Filter (square).

Dimensions: 11-3/8" x 11-11/16" x 1-3/8".

Replacement for deluxe models include: 20600-02, 20600-03, 28238.

Healthway Part Number 50400.

Spruce part number 28241.

Stage 1 - Poly Propylene Mesh: Large particle collector of dust, hair and lint.

Stage 2 - Anti-Microbial: Inhibits bacterial growth in filter.

Stage 3 - Zeolite Pellets: VOC/Gas Adsorbent.

Stage 4 - Carbon Pellets: VOC/Gas Adsorbent.

Stage 5 - Potassium Permanganate: VOC/Gas Oxidizer.

Stage 6 - Anti-Microbial: Inhibits bacterial growth in filter.

Stage 7 - Poly Propylene Mesh: Large particle collector of dust, hair and lint.