Vixen Optics 37212 SLV 20 mm Eyepiece (Grey)<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"> Size: 31.7mm- 1/25" </span></li><li><span class="a-list-item"> Apparent FOV: 50 Deg. </span></li><li><span class="a-list-item"> Eye Relief: 20mm </span></li><li><span class="a-list-item"> 7 Elements/4 Groups </span></li><li><span class="a-list-item"> Weight: 158g/5.57 oz. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41Pi9q6OG-L.jpg" noproxy>