These convenient kits contain everythig needed to evaluate dialysis membranes for your application. The small roll is also ideal for low volume projects. Cellulose Ester (CE) offers a wider range of more precise MWCO's for critical separations; packaged wet in 0.05% sodium azide. Available in cellulose ester (CE) or regenerated cellulose (RC). Also available in a variety of MWCOs for your application needs What's Included: 1 m roll of Biotech CE dialysis tubing, 2 universal closures, and 5 opening picks Ideal for concentration, purfication, and desalination High-purity membranes with no heavy metal or sulfide contaminants.