How big is the 3-Stage Under the Sink System? What size are the fittings?Updated a year ago

The 3-Stage Under the Sink System is both large enough to filter contaminants from large quantities of water and compact enough to fit neatly under your sink. An image with the exact dimensions is below. The fitting on the intake line is female ⅜” compression. The fitting on the output line is male ⅜” compression.