Prepaid Shipping Poly Paks from FedEx are great! There's no hassle of the post office, you can spend more time focused on more important things and know your mold samples are safely on their way to be tested.  Now regardless of budget, you can get as many prepaid shipping Poly Packs as you need!   Note: All Prepaid Poly Paks will be Fed-Ex and insured for $100.