10-50pcS 16x3 16x4 16x5 17x3 17x4 17x5 Disc Round Magnets Black Ferrite Permanent Ring Magnet Aimant Saerch Magnet DIY Earth

10-50pcS 16x3 16x4 16x5 17x3 17x4 17x5 Disc Round Magnets Black Ferrite Permanent Ring Magnet Aimant Saerch Magnet DIY Earth

Aliexpress UK