Snap-Top Vial, 4 mL, step amber glass, clear glass insert pack of 100: 27438: Screw Top Vial (cap not included) 4 mL plastic body (with glass insert) pack of 100: 27243 : Kits: back to top: Preassembled ( pack of 100) Includes each of the following: • screw top vials, 15 x 45 mm, 4 mL • glass inserts, 0.30 mL clear glass, conical • bottom