Muffler, Air Inlet Size 1/4 in, Air Inlet Type BST, Air Inlet Gender Male, Filter Element Material Stainless Steel, Maximum Operating Pressure 300 psi, Minimum Operating Temperature 35 Degrees F, Maximum Operating Temperature 160 Degrees F, Noise Reduction Rating 18 dB, Air Outlet Gender Male, Air Outlet Size 1/4 in, Air Outlet Type BST, Body Material Aluminum, Minimum Flow Rate 0 scfm, Outside Diameter 5/8 in