12x12x4 air filters for your furnace, air conditioner, heat pump, or hvac system actual size (exact dimensions): 11.5 x 11.5 x 3.75 inches (6-pack) merv 13 electrostatic media (mpr 1900, fpr 10) protects against 98% of particles pleated design traps more airborne particles and lasts 3x longer than fiberglass all industrial-grade components are made in the usa and designed to be recycled
