A must have for any office, store or building with elevators. Simply stick these anti microbial, self cleaning covers over the buttons in your elevators and know your visitors, customers, guests and employees are receiving peace of mind. This hero product allows cleaning elevator buttons after each touch to be be possible. EPA approved technology. Works 24/7. Suggested replacement: Every 6 months depending on frequency of touch. Available in 3/4" and 1" sold 50/pack.