Overview Reviews Product Description Magnetized through thickness. No coating. Product Videos Custom Field Grade Y30BH Weight 1186g Product Reviews Write a Review Write a Review × 145mm (OD) x 75mm(ID) x 20mm - Y30BH-Ferrite Ring Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *