AmScope EP15X305 Pair of WF15X Microscope Eyepieces (30.5mm)<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"> 15X Magnification Power </span></li><li><span class="a-list-item"> 30.5mm Mounting Size (in diameter) </span></li><li><span class="a-list-item"> Wide Field of View </span></li><li><span class="a-list-item"> Fits four mounting sizes: 23mm， 30mm， 30.5mm， and C-mount (two mounting adapters included) </span></li><li><span class="a-list-item"> Calibration kit included for precise measurement is included </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/4137bx4jA%2BL.jpg" noproxy>