These 2Work Antibacterial Probe Wipes are 70% alcohol for disinfecting probes between use The wipes are tested to BS EN1276 standards and kill 9.9% of all bacteria within 30 seconds, including E-coli, Listeria, Salmonella & P Aeruginosa Each wipe measures 120 x 130mm This handy dispenser tub contains 200 wipes