Manufactured from superior quality 51A amber (Type 1, Class B) glass, Thermo Scientific™ 10mm Wide Opening Screw Thread Vials are have a 10-425 thread finish. Choose the right vial for your needs. Get maximum sample extraction without need for separate inserts by using Microsampling and High Recovery Vials. Identify sample and volume using the graduated, write-on patch provided on certain vials.