Premium air syringe barrels are manufactured with the highest quality standards for the best performance, reduced material waste, and provide ergonomic relief. We package these clear barrels with a white polyethylene stopper for most dispensing applications. However, several other options are available which include an orange straight-wall stopper for high viscosity material, a red stopper for low viscosity materials, or a tan plastic stopper designed specifically for materials containing air pockets. These kits come in boxes with 20 air barrels and stoppers.