I NEED A FOAM WINDSCREEN THAT WILL FIT MY SONY ELECTRET CONDENSER MICROPHONE, MODEL #ECM-2157. OLD WINDSCREEN WAS APX. 3 INCHES LONG, AND APX. 7/8 INCH IN DIAMETER.
WILL THIS WORK OR DO YOU HAVE ONE THAT WILL WORK?
Unfortunately the manufacturer does not provide detailed specs on this item, it is doubtful that it will fit. Rycote makes a similar product that, judging from the dimensions you've indicated, should fit. The Rycote 10cm foam windscreeen can be found here: http://www.adorama.com/RY104409.html