10 Metal Bobbins. Fits the following models of Janome (New Home)........

100, 105, 106, 108, 110, 2003P, 300, 344, 372, 373, 393, 415, 419S, 423S, 436, 444, 4444, 446, 4612, 532, 535, 552, 556, 592, 609, 620, 623, 625FA, 626, 628, 640, 641, 642, 655, 656A, 656B, 657, 657A, Jem Gold 660, 670, 692, 792, 808, 844, 900, 910, 920, 980, 990, 1004, 1008, 1014, 1018, 1308, 1312, 1406, 1408, 1410, 1504, 1506, 1508, 1510, 1512, 1518, 1550, 1560, 1570, 1571, 1580, 1585, 1612, 1622, 1714, 1722, 1780, 1803, 1804, 1806, 1810, 1812, 1814, 1816, 1818, 1822, 1918, 2039, 2041, 3822, ENX24, Combi, Combi-10, HF107, JD1818, Jem 639, Schoolmate S-3015 

Bobbins measures 7/16" thick x 13/16" wide.