The flange guide is used to hold media on the feed roller of your Roland printer. It be can be used for media up to 110 lb. (50 kg) on a standard 3" core. The Roland part 1000003083 is compatible with all roll-to-roll Roland inkjet printers and GX-24 and GX Pro Series vinyl cutters. This item is sold as a single unit. NOTE: Two (2) units are needed to support a roll of media.