Vacuum System Accessories Flow-Through Silencers Model No.: FTS-1.5 Part Number A in. (mm) B in. (mm) D1 G Thread D2 in. (mm) D3 in. (mm) Item Weight oz. (grams) FTS-1.5 0.69 (17.5) 5.5 (139.7) G 1-1/2 1.32 (33.5) 2.24 (57) 8.042 (228)