One pair of  8" foam surrounds suitable for the Realistic speaker including the 

                                                                                                                             OPTIMUS & RADIOSHACK  2035 , 3046 , 40-1006 , 40-128BC , 40-1024 , 40-1027 , 40-1016 , 40-1100 , 40-1286 , 40-1366 , 40-1988 , 40-4034 , MC 1000 , MC 1401 , MC 1600 , NOVA 15 , NOVA 16 , NOVA 4 , NOVA 5 , OPTIMUS 2B , OPTIMUS 6 , OPTIMUS 10 , OPTIMUS 40 , OPTIMUS 600 , T100 etc.

Specifications are as follows.

                                                      OUTSIDE OF THE LIP   -  197mm

                                              OUTSIDE OF  THE BUMP     -  178mm

                                                   INSIDE OF  THE BUMP    -   150mm

                                                        INSIDE OF THE LIP     -   137mm

  THE ADHESIVE USED INTHE INDUSTRY TO GLUE FOAM SURROUNDS IS OF THE ACETATE FAMILY.IT IS SOLD COMMERCIALLY AS EITHER PVA ( WOOD GLUE ) OR AS EVA ( CRAFT GLUE ). IN THE UNITED STATES IT IS SOLD  COMMERCIALLY  AS ELMERS GLUE.