BOLA Laboratory Screw Joints, PTFE. Red (normal temp)and Black (high temp) screw cap made of glass-fibre reinforced ETFE, inner parts consisting of a v-ring (ETFE), a tapered ring and a sealing ring (both PTFE) as well as an o-ring (FKM) for tubing diameters under 3 mm, (not exposed to the medium). Very good chemical resistance, the medium is only exposed to PTFE.
