Compatible models: mop pad and Wicks for iRobot Roomba Combo j7+/ j9+ vacuum cleaner robot, please confirm the model number before purchasing. Premium mop: replacement pad is made of selected microfibre fabrics with dense edge seams, strong Nylon Sticker fastener on the back, efficient water absorption and strong stain removal to remove stubborn stains. Fits perfectly wicks: Wick cap made of microfibre and rubber, which allows the core hole of the water box to be closed stably without a drop of water leaking, and it is robust and durable. Washable and reusable: refill pack is water and machine washable and reusable for up to 60 days depending on the cleaning environment and frequency of use. Colour:As Shown Material:plastic Package Contents: 4 x mop cloth 12 x water core Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.