Apr 19, 2022 · 1.5ml autosampler vial septa with caps Thermo Fisher-Aijiren Screw Top Vials, Caps & Kits - Thermo Fisher The most commonly used vials are 9mm, 12x32mm screw thread vials. A 12x32mm vial is also known as 1.5mL, 1.8mL, and 2.0mL vials by different manufacturers.