Comparison : Item # 4254-01, Volumetric Flask, Wide Mouth with Glass Stopper
Item # 4254-02, Volumetric Flask, Wide Mouth with Glass Stopper
Item # 4254-04, Volumetric Flask, Wide Mouth with Glass Stopper
Item # 4254-06, Volumetric Flask, Wide Mouth with Glass Stopper
Item # 4254-08, Volumetric Flask, Wide Mouth with Glass Stopper