Vacuum Exhaust Mufflers Porous Plastic Mufflers Model No. M-10/100 ANVER Part Number Exact Replacement For P-Series Muffler No. A Thread NPT B Diameter in. (mm) C Length in. (mm) Filter Size Microns Item Weight oz. (grams) M-10/100 N1000 1″ 1.89 (48.0) 6.61 (168) 100 3.58 (101.5)