Dear buyer, we are deeply sorry and puzzled by your review. We always strive to provide quality goods and professional services to every client, this is the first time we have encountered this problem. 1. We agree on all the details of the PI including the size when you place the order. 2. Pls be honest about this: the size of the product sent to Amazon is the same size as marked on the PI 3. As the video we showed you during the previous negotiation, the product can be used well and normally, the only one negative review you received on Amazon is not excluding the possibility of a malicious bad review from competitor in addition to the incorrect use by the customer, please understand it