The two materials behind most riders and listing panels. Here is how they compare for agents in Boise and across the Treasure Valley.
Choose CORO when price and weight matter most and the sign will not be up long. Choose ACM when the sign needs to stay flat and look sharp for a long listing, or when you want to reuse it.
| CORO | ACM | |
|---|---|---|
| What it is | Corrugated plastic sheet with hollow flutes | Two aluminum skins bonded to a polyethylene core |
| Feel | Light and flexible | Rigid and flat |
| Stock rider price | $9 | $24 |
| Best for | Short listings, open houses, status riders you swap often | Long listings, reuse across listings, a premium look |
| Order | Economy CORO stock rider | Premium ACM stock rider |
CORO is a plastic sheet with hollow flutes running through it. It is light, easy to carry in a trunk, and the lowest cost way to put a rider or open house sign in a yard. Our Economy CORO stock rider is $9.
ACM bonds two thin aluminum skins to a plastic core. The result is a rigid, flat panel that holds its shape. Our Premium ACM stock rider is $24.

ACM is rigid and holds its shape, so it suits signs that stay up for a long listing or get reused. CORO is lighter and costs less, which suits short listings, open houses and status riders you swap often.
Aluminum composite material: two thin aluminum skins bonded to a polyethylene plastic core.
A stock CORO rider is $9 and a stock ACM rider is $24 at signboise.com.
Yes. Add the panel or rider to your order and upload your art at checkout, or check the box to email it. A designer checks the file and we confirm before printing.