Filter King 17.5 × 58.5 × 1 Air Filter – 4-Pack, MERV 8 • Sized 17.5″ × 58.5″ × 1″ (actual filter media ~0.75″) • Panel pleated MERV-8 pleated HVAC filter • Sold as a 4-pack — exactly your -4 quantity code • Designed for furnaces, air conditioners, and heat pumps This matches the “FK17.5x58.5x1A-M8-4” part number and spec you’ve repeated.
