Speakers Components Low Profile: 10~29 mm Low Profile: 30~39 mm Low Profile: 40~49 mm Low Profile: 50~57 mm Miniature Monitor Notebook Speakers Speaker with Case Standard Profile Alnico Magnet: 38~62 mm Standard Profile Alnico Magnet: 66~100 mm Standard Profile Ferrite Magnet: 50~92 mm Standard Profile Ferrite Magnet: 100~134 mm Standard Profile Ferrite Magnet: 156~305 mm Low Leakage Flux