Comparison : Item # QFC-4-3, Flask, Erlenmeyer, with Thread
Item # QFC-4-4, Flask, Erlenmeyer, with Thread
Item # QFC-4-5, Flask, Erlenmeyer, with Thread
Item # QFC-4-8, Flask, Erlenmeyer, with Thread
Item # QF-5-1, Flask, Erlenmeyer