Quality Park R5121 Quality Park Tyvek Heavyweight Jumbo Envelopes， 18x23， White， 25/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 large format envelope with an 18-lb. paper stock features a Flap-Stik® self-adhesive closure. </span></li><li><span class="a-list-item"> Lightweight. </span></li><li><span class="a-list-item"> Use for negatives， art boards， blueprints. </span></li><li><span class="a-list-item"> Won’t abrade or chemically affect contents. </span></li><li><span class="a-list-item"> Send or store large items. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31u4PVOOFkL.jpg" noproxy>