Devon™ Needle Counter 20/40 Count Sterile (189491_BX) 12/BXSafely and sensibly keep track of used needles with this foam block needle counter. Needle holder attracts and retains up to 20 or 40 needles, depending on sharps size. Red packaging signifies biohazard. Adhesive strip on box exterior to secure and maintain position on any work surface Sterile and intended for single use BoxLocks allow for secure closure and disposal, yet re open easily for recounts.