Material: high quality plastic PP material, smooth sidewalls, good transparency, safe, sturdy, durable easy label on outwall. Capacity: 1~5ml graduated test tube body, easy read the volume. 16 x 59mm(D x L)/ 2.3 x 0.6 inches(D x L). Performance: low temperature resistance and long-term freezing(120/248F sample tube -80 -112F). Leakproof: screw cap size19mm/0.74inches, with a silicone ring-shaped seal inside provide a secure seal, leak-proof, safe, convenient, clean and non . Applicable to: apply to contain liquid, solid, powder, seeds, pills, granular objects and more in hospital, schools, scientific reasearch laboratory, etc. Material: PP colour: blue Package Contents: 50 x plastic vials with screw caps Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.