Zymo Research C1104-50 Zymo-Spin IIC-XLR Columns, Capped, No Collection Tubes, 50 Columns/Unit - 11-503XL | Genesee Scientific Zymo Research C1104-50 Zymo-Spin IIC-XLR Columns, Capped, No Collection Tubes, 50 Columns/Unit - 11-503XL | Genesee Scientific