Metal Mesh filters are designed and constructed using a durable aluminum frame with mitered corners to enclose the media element and are secured with rivets. Aluminum media elements are comprised of multiple layers of aluminum that have been slit, expanded and bonded together to form a progressive density design for optimal and even dust loading. This is an aftermarket filter.
My wife, a psychologist, uses these as part of her substance abuse assessment protocol and finds them to work well. She has had no false positives so far, since patients who at first denied drug use "fessed up" after seeing the results. Many people do not understand that some prescription medications can result in positive substance testing, and can also result in DUI arrests.
Was this review helpful to you?