Ultraviolet Lamp 18 W watt 2G11 for use with Cal Pump Biofilter<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"> SuperLIFE - 10，000hrs - Super Quartz glass UV UltraViolet </span></li><li><span class="a-list-item"> Compatible replacement for Water and Air Sterilization </span></li><li><span class="a-list-item"> Type: Ultraviolet Germicidal Bulb UV-C 254nm </span></li><li><span class="a-list-item"> Base Type: 2G11 </span></li><li><span class="a-list-item"> Length: 8 1/2" (including plastic insert) </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/21EObmfno8L.jpg" noproxy>