DWK Life Sciences (Wheaton) Liquid Scintillation Vial with Urea Closure Polyethylene Cone Liner, 20 ml, 61 mm H . Liquid Scintillation Vial, 20 ml, 28 dia x 61 mm H, Clear, Borosilicate Glass, 22-400 Closure Size, Urea Closure, Polyethylene Cone Liner, Screw Thread Finish, Stress Crack Resistant, Excellent Sealing Characteristics