SeaSense Super Polymer Bow Roller， 4-Inch<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"> Resilient， non-marring， molded poly vinyl bow roller. Allows boat to roll smoothly on the trailer. Unaffected by oil， gas or salt. Spins freely to reduce drag while launching your boat </span></li><li><span class="a-list-item"> A = 1/2" B = 5" C = 7" </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41zXmRWu0EL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31aZEz1HdEL.jpg" noproxy>