Complete 2 speaker foam surround installation kitThis is a "Standard" 12 inch angle-attach foam surround kit. It will fit several dozen different commonly used 12" speakers of different brands and models whose foams match the measurements shown.Same 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 2A12B Outer Diameter 11.75" - 298mm Outer Roll Diameter 10.625" - 270mm Cone Diameter 9.25" - 235mm Inner Diameter 8.5" - 216mm Roll Width 3/4" - 19mm Inner Attachment Angled How To Center Your Voice Coil Using Smartphone or Tablet