NcStar 30mm Adjustable Height Ring w/ 1in. Insert<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"> Height is adjusted with Elevation Wheel， Set Screws Lock Ring Height </span></li><li><span class="a-list-item"> Optic Center Height: 1.39” – 1.56” </span></li><li><span class="a-list-item"> Overall Height: 2.07” - 2.25” </span></li><li><span class="a-list-item"> Sold as a Single Ring </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41HXJeq9IaL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41Ht8NpqY9L.jpg" noproxy>