Roll up display stand media film for UV Pigment ink, 30 meter long roll and a grey back.
Lamination (Recommended) Protect inkjet decals from scratching. (Crystal Lamination available under the 'Laminate and Varnish' Category)
Un-laminated (not long term) Even the best inkjet printers designed to print decals will give you at best 6 months outdoor life, depending on the extent of exposure to UV light and weather. Non scratch resistant too.