Use with all types of dialysis tubing including regenerated cellulose, polyvinylidene difluoride, and hard to close cellulose ester. Kinder, gentler design is less likely to damage high purity, high molecular weight tubings. Constructed of durable nylon and available in six colors for easy sample identification. For best results select a closure that is 4 to 10 mm wider than the flat width of the tubing. Pack of 10.