Filter Silencer (M)NPT Outlet (In.) 3/4 Max Flow (CFM) 25 Filter Rating (Microns) 2 Paper Filter Media Noise Reduction Rating NRR (dB) 5 to 15 Filter Efficiency ( Percent) 99 Temp Range (F) -15 to 220 Carbon Steel Housing Material Height (In.) 4-1/2 Nipple Length (In.) 1-1/4 Dia (In.) 4-1/8 Silencer Tube Design For Use With 4FY38