The main objective of the present work was investigated the self-magnetization for Iron filling samples. The experimental shown that the self-magnetization increasing dependent on size nanoparticles for the samples (x1,x2 and x3), which x1 denote the hard sample, x2 is the mid-size and x3 is soft one for Iron filling. The magnetization of sample x3 was greater than sample x2and sample x1.