... With PVC 3,Washable,For cloth 4,Durable. Sew Magnet Nickel Plated Properties of this style round magnets:Material: NdFeBGrade:N35Shape ... (BHmax)Maximum Operating Temperature (G)(mT)(Oe)(kA/m)(kOe) min(kA/m) min(MGOe)(KJ/m3)(°C)(°F)N3511700117010900868129553527980176 N3812200122011300899129553830380176 ... N-( N35, N38, N40, N42, N45, N48, N50),Magnet M-(35M, 38M, 40M, 42M, 45M, 48M),Magnet H-(35H, 38H ...