Vistec X-Ray Detectable Sponge, Round, All-Gauze, X-Large, 1 5/8", 2000/cs (6653)USP Type VII gauze. Unique dual colored element combines blue radiopaque strand with white strand which is visible when sponge is saturated with blood. Element is latex free and runs through both sides of sponge to facilitate counting. Precise, double vacuum delinting process assures low lint. Sponges are paper banded in 10's, utilizing state of the art electronic counting eyes to help ensure a count of 10 sponges time after time.