10x18x4 air filters for your furnace, air conditioner, heat pump, or HVAC system Actual size (exact dimensions): 10 x 18 x 4 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
