These vials feature heavy wall weight and uniformly distributed glass walls. Have high tolerance to thermal shocks and low extractable. These vials are used in clinical and research labs, industrial and consumer markets for storage of reagents, chemicals and packaging of certain pharmaceutical products. These autoclavable vials are available in 50ml, 100ml, 250ml and 500ml capacitates with 32mm Crimp Finish Neck. Matching rubber stoppers and aluminum seals also available. Buy from Amazon.