100pcs/lot M3 external tooth magnet for LED indoor module magnetic attraction P2 P3 P2.5 P3 P4 P5
https://www.vogueparade.com/shopping/EN/4004/1/33014284387/100pcslot-m3-external-tooth-magnet-for-led-indoor-module-magnetic-attraction-p2-p3-p25-p3-p4-p5//