European style flasks have tapered walls with a shallow bottom for more efficient magnetic or mechanical half-moon shaped paddle stirring

These four-neck flasks have three [ST] 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 neck is placed in front of the in-line necks and is internally threaded to accommodate thermometers or bleed tubes up to 7mmO.D. Supplied with #7 nylon bushing and FETFE O-ring. Fabricated from borosilicate glass.