This 15 inch long extension set (Part # 17549) is built of PVC tubing with a polycarbonate flow controller bonded within the tubing length. The ABS male luer and PVC female luer are bonded on the tubing ends. Each luer has a polyethylene cap. The flow controller’s clearly marked cylinder has measurements from five to 250 milliliters per hour. An internal chamber regulates the flow. Two hands are required to adjust the controller, preventing involuntary motion. This extension set offers a cost-effective way to save time by having a pre-assembled section for inclusion in the fluid line.