Description: 13-425 Thread Screw Cap 13-425 screw thread caps, septa, and vials are designed for specific use with the aijiren Technology WISP 48-Position Autosampler. Vials are manufactured of Clear, Type 1 Class A or Amber, Type 1 Class B borosilicate glass and include a write-in Fits Diameter: 0.5118 inch; Material: Aluminum, Other