These macro pipet tips are manufactured of natural-colored, high-grade virgin polypropylene. It is compatible with most macropipettes, including the Socorex® Calibra®. Precision injection molding care for air-tight fit, and free from trace metals. This macrotip may be used in conjunction with a cellulose macrotip filter to guard against the possibility of cross-contamination. This feature is particularly useful when pipetting biological materials and other contaminants. Sterile macrotip is DNase and RNase-free as well as pyrogen-free. Cellulose Filter Sold Separately. Disposable. Sterile. Material: Virgin Polypropylene. Tip Color: Natural. 2 mL Pipette Tips: Size: 115.5mm. Tip Style: Regular. Volume: 2¬µL. 10 mL Pipette Tips: Size: 150mm. Tip Style: Regular. Volume:10¬µL.