Complete 2 speaker foam surround installation kitSome of the models that use this foam include : Design Acoustics DA-900, DA900, PS-8, PS8, PS-8 B, PS8B, PS-8 C, PS8C, PS-88, PS88, PS-9, PS9 and others that match the measurements shownSame American-made surrounds that we use in our professional repair facility; NOT cheap Chinese copies!! Kit includes: - 2 Premium American-made Foam Surrounds (Enough for 2 Speakers)- Step-by-step installation instructions - (Also see video below)- 1 Bottle of premium professional-grade adhesive (Solvent-based)- 1 Adhesive application brush Kit 2A8-DA Outer Diameter 7.75" - 197mm Outer Roll Diameter 7" - 178mm Cone Diameter 6" - 149mm Inner Diameter 5.5" - 137mm Roll Width 1/2" - 13mm Inner Attachment Angled How To Center Your Voice Coil Using Smartphone or Tablet