Everything that a customer might need to complete a GXG transaction is all gathered together in one convenient place. Beginning in May, these shipping kits will be made available free to customers who respond to an advertising campaign — customers will receive messages through an e-mail blast, a banner ad on USPS.com®, a direct mail postcard, and print ads in business journals. They will respond by filling out their contact information at a Web site or by sending back a business reply mail postcard.