Quality Park R4497 Quality Park Tyvek Open End Exp Envelopes， Hvywt， 12x16x4， White， 50/ctn<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 expansion envelope features a Flap-Stik® self-adhesive closure. </span></li><li><span class="a-list-item"> Use for bulky items. </span></li><li><span class="a-list-item"> Resists punctures， tears and moisture. </span></li><li><span class="a-list-item"> Expands on sides to fit binders， books， reports. </span></li><li><span class="a-list-item"> Use instead of cartons or boxes. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41DIQTwilYL.jpg" noproxy>