Quick Answer:The Two Neck Reaction Flask Lid is a heavy-wall borosilicate glass lid with a centre neck and an angled side neck, both with 24/40 standard taper joints, that fits 150 mm flanged reaction vessels.
Last updated: 18 October 2026
Key Features
Two necks: one centre and one angled side neck.
24/40 standard taper joints.
Fits 150 mm flanged vessels.
Flat ground flange surface that can be greased.
Heavy-wall borosilicate glass, heat and chemical resistant.
Technical Specifications
Specification
Value
Material
Heavy-wall borosilicate glass
Necks
Two (one centre, one angled side)
Joints
24/40 standard taper
Fits
150 mm flanged vessels
Flange
Flat ground surface, can be greased
How It Is Used
The lid is placed on the flange of a 150 mm flanged reaction vessel, with a little grease on the flat ground surface to seal it. Jointed apparatus is then fitted to the two 24/40 necks.
Frequently Asked Questions
What vessel does the Two Neck Reaction Flask Lid fit?
It fits 150 mm flanged vessels; its flat ground flange surface can be greased for sealing.
Related Lab Glassware
See the full lab glassware range, or these related reaction vessel lids and vessels:
