These 2Work Antibacterial Probe Wipes are 70% alcohol for disinfecting probes between use. The wipes are tested to BS EN1276 standards and kill 99.9% 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.