Fisherbrand 11mm Crimp Top Vials 2mL, 12x32, Crimp Top Vials and Inserts • Superior quality clear (Type 1, Class A) or 51A amber (Type 1 Class B) glass • I-D vials feature a write-on patch with graduation for convenient sample identification • Wide neck opening design, allows easy filling, requires Micro-Inserts with a diameter of 6mm