Precision cartridges with Luer-Lock connections. Due to the high manufacturing accuracy of the inner diameter, a constant discharge volume of the entire cartridge content is achieved. The cartridges are free of silicone and chloride-free polypropylene and are available in three different colors: Transparent - used for most applications. Amber - protect the contents from UV light (up to 520 nm) and at the same time enable visual monitoring of the contents. Black - block UV light completely. Available in pack of 50 pcs.