Usage Tips: for iRobot Roomba 700 Series 760 770 780 790 Robot Sweeping Accessories Product Description: This product is not new (about 90% new), it has been strictly tested before shipment and is normal! Before placing an order,be sure to confirm that your device models, the relevant fit model mentioned on this product page, you can check the specific product model number on the nameplate at the bottom of your device (many machine have extremely similar names, so you need to distinguish by the specific model number), if you are requesting a refund due to your purchase of the wrong product,you will be responsible for the return shipping costs. 1,These are not the Genuine /Original products,what we sell are Compatible Replacement Products. 2,Package include all kits show in pictures which option you selected above. 3,If package lost or broken in transit ,we will refund money to you,you should contact us ASAP. We will help you to resolve the problem. 4,Please give us the opportunity to resolve any problem.We understand the unhappiness you might have if the order go wrong,but we will try our best to give you the satisfying results.