The UNIVERSAL Ferrule for many APPS
SOFT & Malleable material NOT Amorphous !
where normal metal Ferrules are Useless
> & tend to break or distort glass, ceramic > metal tubing !
whats-more ! with care the GFs can be reused ! > & simply slide-off the tube
> leave the GF inside the “nut” > thet do NOT require any metal “backing” ferrule ! . . . except for 1.5, 1.75, 2.0”ID where backing ferrule is required
( and uses less graphite to make ! )