Our Conical Adapter Bodies offer a great solution for connecting soft-walled tubing of varying ID to a 1/4-28 flat-bottom receiving port. They are manufactured from either Tefzel(r) (ETFE, for superior chemical resistance) or PEEK polymer (for mechanical strength and reliable chemical compatibility), and they feature a two-stage stem over which you can guide your soft-walled tubing to securely hold it in place. Brochure