Feature: This listing is for 2 FILTERS (A Pair) Our product is very highly precision manufactured, you can tell in the close up photos how well the threads are cut, the stainless steel purge valve is top quality and the actual filter is high quality brass and very well made. This is one of the best filters you can purchase anywhere and we have it affordably priced. ¼ inch threads, 1 male 1 female. Brass long lasting micron filter for water, oil and particulate removal. Stainless Steel drain valve for purging the collected removed fluids. Does not reduce pressure by much allowing operator to regulate air flow to your requirements. Clear filter body so visual sight of fluid collection capable. .