The D19 is a round tube with a 19mm (3/4 inch) diameter. It is available in standard capacities of 10ml to 20ml. This IML tube is available with various specifications. 0.5, 1.2, 2, 3 or 5mm orifice. 1.2 or 2mm lip and 3 different nose options. Tamper seals and OTR/WVTR barrier options are available making these tubes ideal for delicate beauty formulations.