Check the listing for details. SE GP3-PD55 Prospector's Choice Plastic Disposable Droppers (50 PC.). Color: Clear, Condition: New. Listed at 9.46 USD. The SE GP3-PD55 Prospector's Choice Plastic Disposable Droppers (50 PC.) include graduated plastic polyethylene 5-1/2" droppers, which are unbreakable one-piece pipettes that are used to draw and dispense liquids and have a 3 mL capacity. Hold the pipette and squeeze and release the top bulb end to absorb the gold, liquid, or particles you are working with. Use the prospector's choice graduated plastic droppers for prospecting, and all kinds of testing in laboratories, for chemistry, microbiology, e-liquids, fragrances, oils, and more. The polyethylene materials are precisely graduated liquid transfer pipettes and have a variety of uses. This product is great for all kinds of testing in a lab setting, or outdoors while collecting. They are non-toxic for the environment.