REPLACEMENT MOP PADS FOR STM11 STEAM MOP: Pack of 2 replacement microfiber pads. FOR DURONIC STM11 ONLY: The STM-SP is a pack of spare reusable pads that are suitable for our STM11 steam mop only. PACK OF 2 PADS: This pack contains 2 replacement reusable pads for our STM11 steam mop. QUICK AND EASY TO REPLACE: When the existing mop pad is dirty and needs to be washed, simply remove from the bottom of the map and attach a new clean mop pad. WASHABLE AND REUSABLE PADS: The microfiber pads can be washed and reused time and time again. This is both great for your purse and also for the planet!