Standard graduated write-on patch for easy filling and identification of sample Clear, Type 1 Class A or Amber, Type 1 Class B, borosilicate glass May be used with robotic autosamplers in place of crimp style vials 40% larger opening for easier sample preparation 12×32mm vials have maximum fill volume of 1.5mL Must be used with 9mm, StepVial II closures to ensure proper fit and functionality