US Weight Heavy-Duty Steel Stanchion Steel Frame Sign Holder with Plexiglass Covers Compatible with ONLY Steel Stanchions Share information wherever permanent or temporary signage is needed Steel frame is compatible with ONLY US Weight steel stanchions or most 2.5-inch diameter posts Holds 8.5-inch x 11-inch signage with inside (viewable) dimensions of 7.188-inch x 10.313-inch Does not fit US Weight Sentry stanchions and post is not included Plexiglass sign cover keeps your signage protected and supported