The Step Insert precisely sits in the neck of the vial, thus eliminating the need for metal or plastic springs.

  Item # Description
  80211S-1232 Clear Step Snap Ring™/Crimp Vial w/250µL Glass Insert, 100 pieces per case  
  80211S-1232A Amber Step Snap Ring™/Crimp Vial w/250µL Glass Insert, 100 pieces per case