This is a pack of three Standard Gamelan metallophones. The Standard range is mid-priced and uses the same high quality metals as the Premium range for the Gamelan keys, resulting in a completely authentic Gamelan sound. The cost savings relative to the Premium range arise from the simpler Gamelan casings here and this also makes the Gamelan smaller and easier to store. This three Gamelan pack has one of each size of Gamelan, each tuned to a different octave and is great for building up a Gamelan orchestra from scratch, adding to a Starter Pack or extending a Class Pack.
Full details of the pack: https://www.drumsforschools.com/product/gamelan-standard-7-key-3-pack/