The 3K9 single-pass filter kit features three K9 filters mounted in series as a single assembly to provide in-line single pass staged filtration or particulate and water filtration. Each filter is rated for flows to 100 gpm and pressures to 900 psi. Testpoints in cap or block record pressure readings and take fluid samples. Schroeder Industries, (724) 318-1100, www.schroederindustries.com