100% OZONE RESISTANT CONSTRUCTION - Most syringes are constructed with polypropylene, which typically lasts around 1-3 uses before the plunger begins to stick during use. Syringes with rubber stoppers can oxidize nearly immediately when exposed to ozone. Our syringe and plunger are made from ozone-resistant materials, ensuring no oxidation, and minimal sticking during regular use. MALE LUER LOCK - allows you to effortlessly and reliably link the Nuvälsa Ozone Syringe to other ozone therapy accessories, such as ozone generators and tubing. The Luer lock connection secures a consistent and effective ozone stream. 200ml CAPACITY - allows the administration of a typical amount for ozone therapy. The user has the option to do less if desires. To administer amounts greater than 200ml, the syringe can be filled multiple times.