This is a super large circular ring magnet made of ceramic ferrite, sintered, suitable for loudspeakers, heavy industry, we can offer sizes such as 300 x 140 x 25 (30) mm, 300 x 170 x 25-30mm, oversized ring ferrite magnet 260mm oversized ring Ferrite Magnet 260 x 140 x 25/30 mm, thick magnetized, It weighs up to 6kg, welcome customers from all over the world to send inquiries....