14 1/2 " X 19" POLYETHYLENE SHIPPING ENVELOPES Description14 1/2 X 19" POLYETHYLENE SHIPPING ENVELOPES without padding SELF SEALING The perfect shipping/mailing container for anything which does not need crush protection,such as prescriptions in HDPE(High Density Polyethylene) Packer Bottles. 14 1/2 X 19" POLYETHYLENE SHIPPING ENVELOPES without padding SELF SEALING The perfect shipping/mailing container for anything which does not need crush protection,such as prescriptions in HDPE(High Density Polyethylene) Packer Bottles.