... be Dia 220mm, Typical Grade:N35,N40,N42,N45,N52,35H,38SH Speaker Neodymium MagnetGrade Available:N35, N38, N40, N42, N45 ... , 45M, 50M working temperature: 100°C 30H, 33H, 35H, 38H, 40H, 42H, 45H, 48H working temperature: 120°C30SH, 33SH, 35SH, 38SH, 40SH ...