Center Neck & Three Angled Side Neck .Thermometer Pocket Fitted with One Side Neck Joint & Interchangeable Stoppers Comes with Other Two Side Neck Joints.

. Flask Boiling Round / Flat Bottom Heavy Wall Four Neck, Center Neck & Three Angled Side Neck .Thermometer Pocket Fitted with One Side Neck Joint & Interchangeable Stoppers Comes with Other Two Side Neck Joints, Amber Color