Our Solvent Traps and parts are made in the USA with only the highest quality materials, including these materials: Stronger materials also reduce wear and tear on threads which increase product longevity, as oppsed to softer materials which will be more prone to thread damage or less lived short life. https://solventtrapadapter64208.gigswiki.com/5104510/die_besten_side_of_solvent_trap_adapter