One pair of 6.5" foam surrounds suitable for the Advent speaker , including the
ADVENT RUBY etc.
Specifications are as follows.
OUTSIDE OF THE LIP - 159 mm
OUTSIDE OF THE BUMP - 144 mm
INSIDE OF THE BUMP - 124 mm
INSIDE OF THE LIP - 110 mm
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.