These Vespel ferrules contain 15% graphite and are ideal for glass and vitreous silica capillary columns.
When connecting vitreous silica tubing, use a ferrule size larger than the O.D. of the column - for 0.22mm I.D. use Cat.No. 96-072663, for 0.32mm I.D. use Cat.No. 96-072654 and for 0.53mm I.D. use Cat.No. 96-072655.
No hole ferrules are available. Use them to seal off a fitting or drill your own holes for a particular application. Two hole and three hole ferrules are also available for inlet splitting between more than one column.