Ablenet 70000078 UMS Friction Knob Kit for Adjustable iPad Cradle<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"> Mounted Products Max Weight: 5-lb/2.3-kg </span></li><li><span class="a-list-item"> Mounting Surfaces: Table Edge (2-in max)， Tubing </span></li><li><span class="a-list-item"> Articulation (Positional Range): Medium </span></li><li><span class="a-list-item"> Positional Rigidity (Strength): Medium </span></li><li><span class="a-list-item"> Range/Reach: 20.5-in/52-cm </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/21TMlXxuzKL.jpg" noproxy>