Features: All glass process, completely lead-free copper, none of the heavy metals Dreamy transparent appearance 510 thread connection open top loading perfect for syringes & filling machines 0.5 ml and 1.0 ml volume cartridges available not arrives completely unassembled for easy filling intended for distillate only Specification Size: 0.5ml 40*12*12 mm, 1.0ml 51*12*12 mm Cartridge Coil: Ceramic Coil Oil Hole Diameter: Special Working Voltage: 3.3V-4.2V Thread: 510 Thread Resistance: 1.2 Ohm Item: Bud Touch Co2 oil whole-glass.syi