Features: -Inhibits scale and rust buildup in residential and commercial applications. -Prevents staining caused by precipitating iron. -Food-grade hexametaphosphate media. -Filter housing size Pentek Slim Line or Standard. -Initial pressure drop at 1.5 gpm 1 psi. -Temperature range 40 to 100 degrees F (4.4 to 37.8 degrees C). Product Type: -Whole House. Filter Component: -Replacement Filter. Dimensions: Overall Height - Top to Bottom: -9.75 . Overall Width - Side to Side: -2.63 . Overall Depth - Front to Back: -2.63 . Overall Product Weight: -1.26 lbs. Specifications: NSF Certified: -Yes.