The 10FJ-12MJ STR Expander from Fittings Unlimited Inc is designed to facilitate smooth transitions between different pipe sizes. This expander features a 10mm outer diameter and a 12mm inner diameter, crafted from high-quality materials for durability and reliability. It is ideal for applications requiring size adjustments in fluid transfer systems and is compliant with industry standards for safety and performance. The expander's design ensures easy installation and secure connections, making it suitable for both professional and DIY projects.