All of our Covid-19 signage is printed on either aluminum or on adhesive-backed vinyl. They will not rust or weather and can be used indoors or out. Each aluminum sign has a centered hang hole at top and bottom. Vinyl decals are perfect for installing on glass doors and windows. Customization is free with any order of three pieces per size and design. Digital proof included. These signs are designed and printed on Kauai. Adorn your space with unique decor that promotes health and safety.