140pcs/lot M3*L(L=2/3/4/5/6/7/8/10mm ) ABS Nylon Round Standoff Spacer, PCB board spacer OD(7MM) X ID(3.2mm)*L 1000pcs 4 5 4x5 4 6 4x6 4x7 4 7 od l black two pit groove cylinder round led mount support pillar isolation column hood spacer