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

                                                                                                                   4, 6, 7, 8, 9,10 , 15 , 16 , 17 , 20 , 25 , 35 , 90 , 93 , 94 , 98 , 162 ( SPIRIT ) , 338 , 400 , 410 , 18 , 8E , AR9 ( MIDRANGE )AR18 , AR18B , 38B , 94X , 4X , 20000001-1 , 200036 , 200037-0 , 200050-0 , 12100371 , 1210067 , 1210072 , 1210097 , 12197-B , 15G , 18BXI , 25BXI , 38BXI , 22BX , 35BX , 28S , 94S , 28LS , 38LS , 98LS , 9LS , 35T , 4A , 4AX , 93Q , 94R , 94GX , 9LSI , CONNOISSEUR 20 , M6 , MST-1 , POWERED PARTENER 850 , POWERED PARTNER 850  , RED BOX II , ROCK PARTENER , ROCK PARTNER , STUDIO PARTENER , STUDIO PARTNER  , SPIRIT 162 , TSW210 , TSW410 , TSW710 , TSW910 , AR18 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.