Throughput optimization for wireless data transmission

An elongated flat flexible plastic plate having a bent flat portion at one end. A Velcro securing strip is mounted on the flat portion, an inventory designating card having a similar Velcro securing strip on one face thereof may be fixedly but removably arranged on the other strip. The flat plate may be inserted into a roll of carpeting and the like stored in racks so that the inventory card will be outwardly of the end of the roll and will have appropriate indicia thereon indicating style, color, size, and footage of the carpeting. The card is readily removable for revising this data when any carpeting is removed from the roll.