Invoice Enclosed Packing List Envelopes Panel Face Back Load 2.0 Mil Thick - 4.5" X 5.5" 1000 /Case Color: Front- Clear/Orange, Back- White. Load Type: Back Side Load/Side Opening. Adhesive: 25 gsm, Synthetic rubber  Hotmelt. Paper Liner: 70 gsm, White. Inside Usable Dimensions: 4 x 5.