BOBBIN Audio Coils

BOBBIN:
(plastic) size:
38 x 10mm  25 x 14mm
48 x 18mm  28 x 11mm
58 x 18mm  28 x 25mm
70 x 28mm  35 x 25mm
77 x 28mm  37 x 17mm
                  40 x 25mm
                  45 x 17mm
                  50 x 25mm
                  70 x 25mm