This eBay Ad is for two YAMAHA 12" Woofers part# 110009  

Rated 8 ohm, and their cones / surrounds are in excellent shape
They both sound great; design of these shows efficiency.
Their spiders have 8 rolls, quite flexible, standard compact magnet.
Surrounds are made from butyl / poly covering a thin mesh/cloth;
  Looks like no foam rot out that happens with other Manufacturers

Up for sale as a pair; as they are well matched set
     Woofer1  measures 6.1 Ohms and 1.55mH
     Woofer2  measures 6.1 Ohms and 1.57mH
        Cabinets rated at 200W so thats...
        maybe 100Wrms per, or 200Wpeak

The sizes are shown in pictures, the ruler demos key spots.
  - hope that helps you out, as it would for me.
   Sizes 12.5" across lip, & 5" deep.  Weight is ~4pds per
      See feedback on Packing habits... Pack-Attack!

These were pulled from a NS-A835 set of 3-way HiFi speakers 
  as their cabinet's 1/2" particle board broke in on sides.
  - NS-A835's Mids & Tweets are up for sale in solar_home Ads

Market Survey:  there is one for $44 & $25 ship

Thank You for Looking - Notice Shipping is a better price?  Ships to USA.  Handling $5.
Basement clear-out - many Audio items and Loud Speakers.   Selling my collections on Downsize.
There are other cool Audio, Speakers, and electronics at solar_home eBay pages.