Quality Park R1800 Quality Park Tyvek Open End Envelopes， First Class， 12x15-1/2， White， 100/Box<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"> Tyvek® white envelope with a 14-lb. paper stock. </span></li><li><span class="a-list-item"> Tyvek® exterior. </span></li><li><span class="a-list-item"> Lightweight. </span></li><li><span class="a-list-item"> Durable and reliable. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41kjbV4RxRL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31if1dvzfKL.jpg" noproxy>