SPONGE, XRAY STR 4"X4" 16PLY STR LF (10/TR 72 McKesson X-Ray Detectable Sponges 4 inch x 4 inch (10.2 cm x 10.2 cm), 16-Ply Sterile Radiopaque Contains blue x-ray detectable barium sulfate strands for easy identification. Single Use Not Made with Natural Rubber Latex. Packaged: 10 Per Tray, 72 Trays Per Case