21x27x1 Trane Replacement MERV 13 Plus Carbon AC Furnace Filters 6 Pack HPS You can count on the

You can count on the secure safety nylon lock system

Each container includes 7 million live beneficial nematodes

24W puts out 2000 initial lumens per tube

Designed to stack on top of each other for maximum airflow

Irrigation Injector (1:100 ratio): 10–18 fl

21x27x1 Trane Replacement MERV 13 Plus Carbon AC Furnace Filters 6 Pack HPS You can count on theNordic 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