List Price Unit 475-72370-PK Thermo Scientific National Septum Only, 1.5 mm Silicone / PTFE, for 8-425 caps - 100 ea Specifications 3958508 Sign In B7995-8 $36.30 PK 845-49333 Thermo Scientific National Septum Only, 1.5 mm Silicone / PTFE, for 13-425