Email support@rhinocg.com with the weight (including the slider) and the dimensions (L x W x H) of the box you will be using to send it in. If you are in the US, we will email you a prepaid label upon verification of your initial order. If you are international, reach out to us to let us know you will be participating in the promotion and we will give you a claim # to use for reference when sending in your slider. International customers are responsible for shipping costs.