Panasonic KX-FA94 Compatible Black Ribbon Fax Cartridge for Panasonic KX-FB421 P<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Product Type - Thermal Transfer Cartridge </span></li><li><span class="a-list-item"> Yield - 400 pages @5% Average </span></li><li><span class="a-list-item"> Compatibility - Panasonic KX-FB421 </span></li><li><span class="a-list-item"> Output Color - Black </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51Ez4%2BAtYEL.jpg" noproxy>