Opened box. One in plastic, other one without plastic *

2 PACK MSA3/MSA3S True HEPA Replacement Filter is designed to be compatible with Membrane Solutions MSA3 air purifier models. This filter set includes two H13 True HEPA filters with a filtration technology that captures airborne particles as small as 0.3 microns. With a filter life of 6 months, these pleated filters are easy to install and provide clean and fresh air for your indoor space. The product dimensions are 15.5"L x 11.4"W x 1.2"Th, making it suitable for various room sizes. Upgrade your air purification system with this reliable and efficient filter set.