55mm-55mm Male-Male Thread M-M Macro Close Up Photography Lens Coupling Ring for Mounting Two (2) Lenses Face to Face<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"> Male to Male threads for reversing one lens on the front of another </span></li><li><span class="a-list-item"> Made of metal and comes with a free lifetime warranty from the Camera Hunter </span></li><li><span class="a-list-item"> Top quality craftsmanship made in JAPAN </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51jQT49VqQL.jpg" noproxy>