Microsolv Technology Corporation Vials, Headspace, Crimp Top, Glass. Clear, 6ml, 20mm Serum Finish, 22x38mm outer dimensions, Flat Bottom with a Long Neck. Aijiren Compatible. 100/PK. Supplier: Microsolv Technology Corporation 95025AG06C. First hydrolytic, Class A, Borosilicate Glass, Use with aluminum or steel crimp caps for proper sealing.