Grooved to accommodate an O-ring and create a greaseless vacuum-tight seal, these borosilicate glass reaction vessel lids have three necks with side necks that are 180° apart.

• All three necks have Standard Taper joints
• Designed to be used with the LG-8071, LG-8079A, LG-8079B, and LG-8079C vessels.
• Flange O.D. is 5.375"

O-ring size: 348