HP LaserJet Automatic Duplexer for Two Sided Printing part # Cb519a<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" 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"> Catalog Publishing Type - Printer Auto Duplex Units-Standard </span></li><li><span class="a-list-item"> Depth - 6 in </span></li><li><span class="a-list-item"> Global Product Type - Printer Auto Duplex Units </span></li><li><span class="a-list-item"> Height - 12.80 in </span></li><li><span class="a-list-item"> OEM/Compatible - OEM </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41j8lQ0-4zL.jpg" noproxy>