A simple and easy to understand user safe flyer slide show on corporate promotions for custom usb flash drives. The custom USB Flash Drives are often made with PVC or rubber which allows for great design detail and a very inexpensive mold process. Promo Crunch and USACustomFlash.com are often referred to as the leaders in custom designed and delivery of rubber custom PVC USB flash drives. Custom PVC rubber flash drives are a promo crunch field of expertise. Available to corporate promotional products needs and can be shipped around the world.