Thermo Scientific™ 4mL Clear Screw Top Vial, Silanized - Ibis These 13mm vials are 4mL, 15x45mm vials with 13-425 thread finish. Manufactured from superior quality 33 expansion borosilicate clear (Type 1, Class A) glass and feature a 13-425 thread finish, they are available in Thermo Scientific™ brand. Product Size. Pack of 100.