PurTec 510 Thread Cartridges are the industry standard throughout the World. PurTec is the only cartridge for oil that is emissions tested at AFNOR standards, the strictest guidelines set by the European Union. All of our products are highly customizable and offer several branding options. PurTec Designs is an OEM,ODM manufacturer based in Vancouver, Washington and Irvine, California. As a USA company, we provide in-person concierge services including production line efficiency training, filling/capping SOP's and training, design consultation services, custom packaging, and more. Forget about the headaches from dealing with overseas companies, PurTec Delivery Systems is unrivaled and cost effective. Call us today to learn more.