DWK Life Sciences (Wheaton) vials include 9718J25 caps of polyethylene, size 22, without liner. “PET” Plastic Scintillation Vial (9718J50) Vials are polyethylene terephthate (PET); caps are polypropylene, size 22, with metal foil liners Capacity 20 mL Total height, with cap, 61 mm; o.d.: 27 mm Vials and…. Related Products: 20 Ml