Water filtration is always at the top of installers lists when it comes to better and super clean installs in window tint and PPF! Some concerns of inline filters were corrosion from metal parts and breakage from glass see through filters. My new Innovative 40 Micron inline filters does away with those concerns of the past! Forward thinking ideas for our Forward Thinking Installers! 1/4 inlet. Super tough poly to last a lifetime!