Product for business contractors. Size (L x W x Thickness): 1.9 x 0.5 x 0.2 inches (48 x 14 x 5 mm). Material: Anatomical ferrite. Surface magnetic flux density (mT): 3.9 inches (100 mm). Suction force: 3.9 lbs (1.5 kg). Surface treatment: None. Quantity: 1 box.