产品介绍：
part no.:mc-816 description:32mm package:150pcs /box, 32box/ctn part no.:mc-818 description:42mm package:100pcs /box, 32box/ctn part no.:mc-820 description:50mm package:64pcs /box, 36box/ctn part no.:mc-822 description:75mm package:36pcs /box, 36box/ctn