Round-bottom flasks with four [ST] 24/40 outer joints and #7 Ace-Thred neck

The outer joints are tooled with reinforcement rings for added strength and stability. Two of the side necks are in-line with the center neck. The remaining side necks are placed in front of the in-line necks. One neck has a [ST] outer joint and the other is internally threaded to accommodate thermometers or bleed tubes up to 7mmO.D. Heavy wall flasks feature walls that are approximately 30% heavier than standard flasks. Supplied with #7 nylon bushing and FETFE O-ring.