ATTENATTENTION 1.The flow range of the peristaltic pump is based on water.The flow range will change if you transfer or fill other liquids, especially viscous liquids such as glycerin/honey/conditioner and so on. So plase contact our customer service before you place orders.2.The cost you pay to us only includes the cost of goods and transportation costs, and our company will ship the goods according to the regular export process (declare the normal value of the goods, and the invoice is based on the payment amount). 3.If your local government or customs requires import customs clearance fees and other import fees, it will be borne by the customer.4.Regarding the return and exchange, the goods should not affect secondary sales.