<b>Easy to Replace</b>: Just remove the old filter and install this brand new filter in its original position. The operation method is consistent with your original product. <br><br> <b>Adaptation Model</b>: Compatible with Honeywell HEV615 , HEV620 Humidifier, replace part # HFT600 filter T. <br><br> <b>Package Included</b>: 4 pack humidifier wicking replacement filters. <br><br> <b>After-sales Guarantee</b>: 3 months free replacement or refund for quality problems; if you have any questions, please contact us via email, we will serve you wholeheartedly.