International One Way shipping cost of delivering kit to your specified address. We require customers to organise and pay the return tracked postage to our international lab. It is the customer's responsibility to understand the customs policy and any applicable duties and taxes for their respective countries. It is solely the customer's responsibility to do any customs clearance required at the destination country as well as tracking the status and clearance of returned samples. We can organise and send the required customs paperwork to you once a tracking number is provided.