Meinl Planetary Tuned GongsThis listing does not include a gong mallet. You can find a selection of Meinl Mallets here. 24" Meinl Neptune Planetary Tuned Gong (G24 N) 211. 44 Hz G#2 A4 a' 440 Hz 448. 03 Hz Meinl Percussion was founded in 1951 by Roland Meinl in Germany. They have for many years made cymbals, congas and a host of other percussion. Their current line of Gongs and Tam Tams are made in the same style as the Paiste Gongs and of the same type of metal, Nickel Silver.