Shield Envelopes 100 Full Face Packing List Enclosed Envelopes 4.5 x 5.5 Inch Packing Slip - Invoice Enclosed Envelopes Pouch - 4.5" x 5.5" / 4 1/2" x 5 1/2" Back Loading Clear Pressure Sensitive Envelopes Item PLE-FP405 Shield Envelopes have become the industry standard for quality performance. Our specially formulated hot melt adhesive insures that envelopes bond instantly to boxes, cases, tubes and other containers. Shield Envelopes 100 Full Face Packing List Enclosed 4.5 x 5.5 Inch Packing Slip - Invoice Enclosed Envelopes Pouch - 4.5" x 5.5" / 4 1/2" x 5 1/2" Back Loading Clear Pressure Sensitive Envelopes Item PLE-FP405 Back Loader: (coded BL) This style packing list envelope keeps documents secure in transit because they cannot be removed without destroying the envelope.