This is the Handmade version, not he MS version as sold in markets outside of the USA. A professional harmonica similar to the Marine Band but using a plastic comb for improved airtightness. The reedplates are recessed behind the plastic mouth piece for smooth playing. Plastic combs are more stable and do not swell, shrink, and crack the way wood combs do. Specifications: 10 single holes, 20 reeds, plastic comb, length: 4 inches.