... 220mm, Typical Grade:N35,N40,N42,N45,N52,35H,38SH Speaker Neodymium MagnetGrade Available:N35, N38, N40, N42, N45, N48, N50 ... °C30M, 33M, 35M, 38M, 40M, 42M, 45M, 50M working temperature: 100°C 30H, 33H, 35H, 38H, 40H, 42H, 45H, 48H working ...