The Wash Check Strips are a designed to verify and monitor the cleaning efficiency of cleaning processes in surgical washer disinfectors for surgical instruments. The test gives a visible indication of problems of chemical and/or mechanical cleaning actions during the washer/disinfector program. The test controls for blood residues on surfaces. The Wash Check is easy to use, shows clear visual determination, is easy to record, lead free and non-toxic and according to EN ISO 15883-1/ : EN ISO 15883-5. 100 Strips per pack.