Tyvek Open-End Envelopes， 1st Class， 10 x 13 Inches， 100/Box， White<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"> First-class envelopes feature super strong， regular weight Teak for secure mailings </span></li><li><span class="a-list-item"> Made of moisture-resistant and tear-resistant material </span></li><li><span class="a-list-item"> Peel and seal open end </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/416CZc3zN4L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41Pw6hgpRmL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31gPaEUB0iL.jpg" noproxy>