Downriver Office Vinyl has been in business in Wyandotte since 1978. It specializes in printing vinyl signs and lettering for cars, boats and windows. Its promotional items also include mugs, pencils, pens, glassware, plastic-ware, holiday cards, calendars, golf balls, clothing, backpacks and towels. Some of Downriver's other services include advertising, engraving, embroidery, business cards, brochures, calendars, rubber stamps, self-inking stamps, faxing and copying.