This listing is for a new Quincy air compressor air intake filter. This filter is made of a felt type material and fits the Quincy QTS-3 or QTS-5 pump. The filter measures 5 1/4" long, 1 1/4" tall, and 5/8" thick. This filter can also be used on other air compressors if the size is right also if you have a different brand of air compressor and it has the same type of filter but smaller this one can be cut down in size to fit.