National Scientific Shell Vials National Scientific Vials Polypropylene Vials Pack. The 1mL 8x40mm vials are specifically designed for Waters 96-position trays. The 2mL vial will work on any standard size 2mL tray. The 4mL vial is compatible with Waters 48-position trays. Shell vials are manufactured from borosilicate glass unless otherwise specified. Vials are supplied with polyethylene push-in caps or polypropylene SepCap closures. SepCap closures are designed for easy syringe needle penetration and easy push-in/pull-out from vial. Molded sealing ring secures sample containment. Conical-style Polyspring inserts are available in borosilicate glass or polypropylene. Convenience kits include vials and caps with pre-inserted septa. Certified vial kits are tested and certified to meet or exceed up to 17 critical performance parameters; certificate enclosed with kit. National Scientific Shell Vials National Scientific C4015-95P Vials Polypropylene Vials Pack