AAA: Advanced technology, Assurable quality, Authentic reputation double layers stuffing(seal strip, sealing ring) 403, 404 series double layers stuffing(seal strip, sealing ring)Main parameters for 403, 404 stuffing boxdD1D2D3n-φH1HWeight (kg)30, 35, 401751451104-φ181203201850, 552402101768-φ181203203960, 65, 702402101768-φ181603804375, 802752402048-φ221804205690, 95, 1003052702348-φ ...