Cylindrical electrode for test stimulation number of contacts 4, distal pitch 9 mm, length 600 mm Cylindrical electrode for constant (chronic) stimulation, number of contacts 4, distal pitch 12 mm, length 800 mm. Cylindrical electrode for test stimulation number of contacts 4, distal pitch 9 mm, length 450 mm Cylindrical electrode for test stimulation number of contacts 4, distal pitch 6 mm, length 600 mm Cylindrical electrode for test stimulation number of contacts 4, distal pitch 6 mm, length 800 mm Cylindrical electrode for test stimulation, number of contacts 4, distal pitch 12 mm, length 450 mm. Cylindrical electrode for constant (chronic) stimulation, number of contacts 4, distal pitch 6 mm, length 600 mm. Cylindrical electrode for constant (chronic) stimulation, number of contacts 4, distal pitch 6 mm, length 450 mm. Cylindrical electrode for constant (chronic) stimulation, number of contacts 4, distal pitch 12 mm, length 600 mm. Cylindrical electrode for test stimulation number of contacts 4, distal pitch 12 mm, length 800 mm Cylindrical electrode for constant (chronic) stimulation, number of contacts 4, distal pitch 6 mm, length 800 mm. Cylindrical electrode for constant (chronic) stimulation, number of contacts 4, distal pitch 9 mm, length 800 mm.