The DTP-S Series fittings are in four-port elbow tee configurations. Included in this series is the DTTP-S Series, which is a six-port double tee configuration. Both series have single barbs with no parting line, and the barbs will expand tubing 50% above its normal size. In addition, the materials available are White Nylon and Natural Polypropylene. Furthermore all the barbs on each fitting are equal to 1/16 inch, 3/32 inch, and 1/8 inch. These fittings are recommended for medical and laboratory environments.