Comparison : Item # 4021-50, Adapter, Inlet, 24/40 Joint to GL 80 Thread
Item # 4021-02, Recovery Flask, Heavy Wall, Wide Mouth, 1000mL, GL 80, Bottle Shaped, Complete
Item # 4021-52, Adapter, Inlet, 24/40 Joint to GL 100 Thread
Item # 4021-04, Recovery Flask, Heavy Wall, Wide Mouth, 2000mL, GL 80, Bottle Shaped, Complete
Item # 4021-06, Recovery Flask, Heavy Wall, Wide Mouth, 5000mL, GL 80, Bottle Shaped, Complete