2ml Clear Screw Cap Vial with Write-on Spot & Fill Lines, Wide Opening, V923. 9mm short screw-thread, 1.5ml, wide opening vial with write-on spot, clear 11.6 x 32mm, USP 1 expansion 33, 100pk. Product Code: V923. Enquire Now. 2ml Amber Screw Cap Vial, 9mm thread, Write-on Spot & Fill Lines. V945.