21x27x1 Trane Replacement MERV 13 Plus Carbon AC Furnace Filters 6 Pack coco Rubber bumpers absorb the shock

Rubber bumpers absorb the shock on completion of cut

Our AC filter media prevents the growth of bacteria or mold

This is part A

Double cooling fans to protect the grow plant lights from high tempertures

denser fruit at harvest

21x27x1 Trane Replacement MERV 13 Plus Carbon AC Furnace Filters 6 Pack coco Rubber bumpers absorb the shockNordic Pure Trane Replacement MERV 13 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air