Filters arrived on time Exact filters I was using before However somewhere between leaving dealer and arrival here, someone dropped the box At least 1/2 the filters are out of shape Bent over I'm hoping to straighten them out as I use themI have been using these filters for years in my home without a problem. I replace my filters every 30 days of run time not calendar days. My thermostat monitor the run time and lets me know when to replace it. My return air grill is 18" x 24" x 1". The actual size of these filters are 17 1/2" x 23 1/2" x 3/4" which is not a problem. They still fit fine in the grill with no gaps. You get 12 individually wrapped filters that come in card board box for storage and retrieval when needed. They are MERV 8 filters which are great for residential application. Don't expect these to be commercial type HVAC filters. If that's what you want then spend the money to get them. These are your standard residential card board framed disposable filters that do a great job and you get 12 filters for $60.00. I have never had an issue with these filters folding or collapsing into my return air plenum. Just make sure you get the proper MERV rated filter for your system.Seem to be thick enough to filter wellwas to receive 12 in pckg but only received 11I change the filter about every 30-60 days, depending on the time of the year, so this is a great deal. My HVAC company said these are best for the money since MERV8 (packaging clearly states MERV8) does not put undue stress on my motor, and are cheap enough to replace every month or so. Each filter is individually wrapped and comes in the original sturdy box. I had my HVAC company also install a metal grid in the holder for the filters since, like others, I found that the cardboard frame of the filters would start bending over time and losing their shape. The metal grid holds them firmly in place.Convenient to order air filters in bulk.Like got new system these where samples so that’s what I’m staying withGood product at a reasonable price.When the filters arrived, the box from Amazon was perfect. However the packaging from the manufacturer inside the shipping box was damaged and one of the filters was squashed. The filters work good.Very good for condos, great to change monthlyAll arrived and all fit.