BQuality Park Poly Mailing Envelopes, 9 x 12 inches, Box of 100 (QUA46190) ReviewbP PP Quality Park Poly Mailing Envelopes, 9 x 12 inches, Box of 100 (QUA46190) PDouble perforations for easy openingPWhite polyethylene with Redi-Strip closurePTamper-evident, tear-resistant, waterproofP