I don't know what brand they using but a quick search on Amazon shows they go from 130 to 2500 ...here's the 130 I have no idea whats the difference is https://www.amazon.com/Tongue-Handpan-Inches-Percussion-Instrument/dp/B07H24VKY7/ref=mp_s_a_1_7?keywords=opsilon+handpan&qid=1554684550&s=gateway&sr=8-7