Material: aluminum>99.7% 1-internal lacquer antioxidize material, bottom latex 2- ultraviolet sterilization Our advantages: ISO 9001 Certified Fast lead time Diameters from 11mm to 38mm Membrane, open end, canule, extended nozzle, nasal tips, ophthalmic tips Metric and US sizes Ability to print base coat plus 1 to 6 colors per tube Internally epoxy phenolic, wax, or latex lined Bulk or partition packing Very competitive pricing