Headspace Crimp/Screw Top Vials, 20 mm, PerkinElmer. Supplier: PerkinElmer. Description: These headspace vials are manufactured from Type I borosilicate glass, which meets all USP, JP, and EP Pharmacopeia requirements. ,97019-386PK,97019-606PK,97012-218PK,97019-612PK,97019-614PK,75835-986PK,10132-954EA.