Nyckelharpa

• 4 rows of keys
  
• wood: maple for the ribs, back, neck, tailpiece
• spruce for the top
• ebony for the pegs with melody strings
• pegs for sympathetic strings: wittner mechanics
• varnish: spirit varnish
• tuning: A4, D4(C4), G3, C3

Childrens nyckelharpa "Baby"

• one chromatic melody string in D4 with keys over one octave,
• two drone strings (A3 and D3), one sympathetic string (D4)
  
• wood: lime or nutwood for the body, spruce for the top

Osanova, 4 rows of keys

• wood: spruce for the whole body
• ebony for the pegs with melody strings
• guitar mechanics for symathetic strings
• varnish: water based varnish
• tuning: A4, D4(C4), G3, C3

Osanova kids, 3 rows of keys

• 3 melody strings
• 5 sympathetic strings
• wood: lime for the body, spruce for the top
• tuning: A4, D4, G3

Octave nyckelharpa, 4 rows of keys

• wood: willow for the body, spruce for the carved top
• the 12 sympathetic strings run through the bridge and under the keyboard
• tuning: C2, G2, D3, A3