RETICULATED SPEAKER FOAM - 48'' x 72'' x 1/4'' Thick - RH-RET-1/4-30-PPIReticulated Speaker Foam Product Description * Black Reticulated Speaker Foam , NEW LARGER SIZE * Commonly used to protect speakers from dust and moisture * 48'' x 72'' x 1 4'' Thick * Flexible conforms easily to curved speaker grills * Cut to size easily with scissors The ''Zapping'' process used to manufacture reticulated foam Zapping is a process that involves placing a bun of foam in a very large vacuum pressure vessel known as a "zapper". The