Top rated Richter-tuned Octave Harmonica (40 brass reeds). Key of C.
The instruments have a divided comb made of plastic. When drawing or blowing, two reeds at a time are caused to vibrate. 
They are tuned with an interval of exactly one octave apart . To minimize air loss and to increase the volume there are additional windsavers built in. The result is a full and powerful sound.
10 discrete holes 40 reeds, 2x2 reeds per channel, half-valved
Body discrete, plastic 
Covers stainless steel,
Reedplates 0,9mm, 
Weight Concerto 94g 3.316 Oz) 
Measures: 125x30x27mm (4.9, x 1.18 x1.06 inches)
 
Thank you.