Carolina's dialysis tubing clamps were designed as a solution to the inconvenience and mess created when sealing dialysis tubing with knots and string. Simply connect the 2 pieces of the polypropylene clamp, place the dialysis tubing flat between the pieces, and snap together. These clamps are easy to use, cost-effective, and reusable. Each is made for tubing with flat diameters of 3/8", 1", 1-5/16", and 1-3/4" (50 mm or less).