Cup Ferrule for ThermoFinnigan 0.38 mm ID (M4 Nut) (10/pk)

100% graphite ferrule encased in metal cup; upper temperature limit 450 deg. C. Graphite is very soft; it is recommended for use with fused silica and glass. Reusable if not overtightened.Packaged: 3 in. x 3 in. x 1/4 in. Plastic Dial Pack; Weight: 8.5 g.