Our one-piece molded barrels are made of polypropylene and do not require a dispensing tip to operate. This natural colored syringe is available in four different tip sizes and offers a great alternative for dispensing thicker materials. All of these air syringes come with a black rubber air stopper, except the 10 cc which comes with a red thermal stopper. The tapered tip can be cut back to widen the opening and allow more material to flow. These items come in boxes of 20.