B+W 40.5mm ND 0.6-4X with Single Coating (102)<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"> This filter uses our standard B+W F-Pro filter mount， which has a front accessory thread and is made of brass. </span></li><li><span class="a-list-item"> Truly Neutral Gray design </span></li><li><span class="a-list-item"> Manufactured from Water-White Schott Glass </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/119URXfnKKL.jpg" noproxy>