Echo Machine Design Letter Set ECHO Message. Analog tape echo and delay masterpiece I imagined the Roland SPACE ECHO RE-201. We have made the mechanical coolness of tape echo in the future. It is perfect for gifts and message cards. Silver paper is used. You can write a message at the top. The envelope is a matte black cotton envelope. Recreate the atmosphere of a synth hard case It creates a synthesizer feel. Also, the card is postcard-sized. It can be used not only as a stationery but also as a postcard. <ECHO Message Product Details> 1 envelope (2-inch envelope) 2 cards (postcard size)