Quality Park Front Packing List Envelopes, Self-Adhesive, Clear, 6 x 4.5, 1,000 per Box, (46996) DURABLE: Self adhesive is strong and permanent so that documents do not get lost during shipment CLEAR WINDOW: Full clear front window allows shipping papers to serve as an address label MOISTURE RESISTANT: Moisture resistant envelopes to preserve inner contents in the mail stream GREAT VALUE: Conveniently packed in 1,000 count to reduce the frequency of repurchasing FEATURES: 1,000 Clear Packing List Envelopes