1. Cartridge, also known as pen syringe glass sleeve.
2. The size of 1.5ml cartridge is outer diameter 8.65mm, length 57mm, and outer diameter of the mouth 7.15mm. Other sizes can also be customized.
3. The colour of 1.5ml cartridge is clear, material is 5.0 neutral borosilicate glass, and its water resistance is type1.
4. We can provide aluminum cap, gasket, piston and other supporting products.