Echolette 51cm Loop-Tape; for Echolette NG-51 "Gold Cage" Echolette S and Echolette E 51, Echo 200, Echo 400; NG 3, NG 4 as also as Dynacord Super 75, Super 65, Super 62, Super 62a, Super 61, Super, Echochord 100, Echochord Mini.