Top grade 3D printing filament, manufactured to very tight tolerances. Made from the highest quality materials to ensure consistent feeding & stable prints. Features PRIMALLOY&8203;TM is a soft rubber material with outstanding heat, oil & abrasion resistance & mechanical strength. It is a high performance polyester based thermoplastic elastomer (TPE). Exceptional diameter consistency providing the best possible homogeneous wire structure for smooth operation. Manufactured in Japan to very tight tolerances from the highest quality materials to ensure consistent feeding & stable prints. PRIMALLOY&8203;TM is a registered trademark of Mitsubishi Chemical Corporation. All filament is delivered in a vacuum bag, with desiccant, wound onto a bespoke spool. 2 year limited warranty. Not food safe.