Basik™ Crimp Top autosampler vials are made of first hydrolytic,. Type-1, N51A expansion, borosilicate glass. These vials are used with many Aijiren, CTC PAL, La-Pha-Pack_Catalogue_EN_6.pdf. other vials of 1st hydrolytic class glass (without surface treatment). glass in 33 expansion and amber glass in 51 expansion. Sample Handling Premium