(4 Pack) HVAC Filterbuy Air 16x18x2 Pleated Furnace AC Filters 13 MERV 5B centimeter 5B centimeter and stable working performance air conditioner 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