Delkin eFilm CompactFlash Cards are designed and manufactured with high quality performance parts for optimal storage in digital cameras, PDA's, and music players. Speeds starting at 55x, guarantee that data transfers will be fast, precise, and perfect every time. eFilm Compact Flash cards are made with premium materials and are assembled in the U.S.A. Furthermore, to ensure the highest quality possible, Delkin's memory cards are put through several rigorous quality assurance tests before being released to the consumer.